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Behavioral ecological models of lithic technological change during the later Middle Stone Age of South Africa
Abstract
This paper examines changes in the organization of lithic technological systems during the later Middle Stone Age (MSA) of South Africa. Using principal components analysis (PCA), the study looks at the lithic data from two important South African MSA sites: Blombos Cave and Klasies River Mouth. The paper uses PCA to describe the transition to (1) the biface-dominated Still Bay industry at Blombos Cave and (2) the microlithic Howiesons Poort industry at Klasies River Mouth. Based on these analyses, the paper offers a synthetic scenario of the emergence of the Still Bay industry from earlier MSA industries, closely followed by the dramatic transition to the Howiesons Poort. Using a few principles of tool design and behavioral ecological models derived from the study of modern foragers, the paper suggests that the Still Bay came about as the result of deteriorating environmental conditions at the beginning of Oxygen Isotope Stage 4, which caused resources to become scarce and more widely distributed. The study proposes that the bifacial point strategy of the Still Bay was a response to wider mobility patterns and increased movement away from lithic raw material sources. The paper then suggests that Howiesons Poort emerged as information sharing strategies improved, and resources in the environment could be more efficiently targeted with more task-specific tools. The paper closes by reviewing the implications of these findings for modern human origins in South Africa.
... Multiple authors have argued for an increase in social coalescence across southern Africa during the Howiesons Poort ( 48,49 and references therein). The impressive technological and symbolic innovations associated with the Howiesons Poort (including the backed artifacts) are seen to relate to new patterns of connectivity, visible in changes in mobility, settlement systems, and foraging strategies 12,13,50 . Our analysis supports this hypothesis, with the observed similarity in backed artifact shape providing strong support for long distance social ties. ...
... It has been argued that environmental stress stimulated the production of backed artifacts 12,13,15,[59][60][61][62] . The environmental argument, which tends to follow the risk hypothesis 27 stresses a correlation between instability in hunting and foraging conditions and the manufacture of backed artifacts as a multi-functional and multi-use tool, which facilitates exploitation in uncertain or unstable environmental conditions 12,13,63 . ...
... It has been argued that environmental stress stimulated the production of backed artifacts 12,13,15,[59][60][61][62] . The environmental argument, which tends to follow the risk hypothesis 27 stresses a correlation between instability in hunting and foraging conditions and the manufacture of backed artifacts as a multi-functional and multi-use tool, which facilitates exploitation in uncertain or unstable environmental conditions 12,13,63 . Recently, however, Archer 28 has correlated an improvement in the habitability of an area, or the 'carrying capacity' (essentially the amount of carbon-based edible biomass) with the production of backed artifacts under a hypothesis which sees backed artifacts appearing in great numbers during periods of population increase. ...
Examining why human populations used specific technologies in the Final Pleistocene is critical to understanding our evolutionary path. A key Final Pleistocene techno-tradition is the Howiesons Poort, which is marked by an increase in behavioral complexity and technological innovation. Central to this techno-tradition is the production of backed artifacts—small, sharp blades likely used as insets in composite tools. Although backed artifacts were manufactured for thousands of years before the Howiesons Poort, this period is marked by a phenomenal increase in their production. In this paper we test both social and environmental hypotheses to explain this phenomenon. We correlate environmental data with changing frequencies of backed artifact production at Sibudu and assess morphological similarity across seven sites in southern Africa. We find that these artifacts are made to a similar template across different regions and that their increased production correlates with multiple paleo-environmental proxies. When compared to an Australian outgroup, the backed artifacts from the seven southern African sites cluster within the larger shape space described by the Australian group. This leads us to argue that the observed standardized across southern Africa is related to cultural similarities and marks a strengthening of long-distance social ties during the MIS4.
... However, ages of up to~100 ka [52, 53] and as young as~46-42 ka [54] complicate this assessment [55][56][57]. Researchers have explained the onset and disappearance of the HP have by various factors, including adaptations to ecological and environmental changes, including shifting territorial organization and mobility patterns [25, [58][59][60][61], changes in subsistence and hunting behavior [62,63], increases in population size [20,22,64], or information transmission between closely connected groups [65]. ...
... How can we explain the consistent pattern of temporal change in lithic technology within Sibudu and the variable diachronic trends across the HP in southern Africa? The origins and abandonment of HP lithic technology have been variously explained by adaptations to environmental changes, including shifting territorial organization and mobility patterns [25, 58,60], changes in subsistence and hunting [62,63], increases in population size [20,22,64], or changing networks of information transmission between connected groups [65]. Table 1 provides the expectations and archaeological correlates of these hypotheses. ...
... The HP backed tools have also been interpreted as specific adaptations to ecological instability in MIS 4 [60,61]. Testing this hypothesis is difficult, since paleoenvironmental data for HP sites are available on different levels of spatial and temporal resolution, complicating correlations between data sets [see [129][130][131]]. ...
The Howiesons Poort (HP) of southern Africa plays an important role in models on the early behavioral evolution of Homo sapiens. The HP is often portrayed as a coherent MSA industry characterized by early complex material culture. Recent work has emphasized parallel technological change through time across southern Africa potentially driven by ecological adaptations or demographic change. Here we examine patterns of diachronic variation within the HP and evaluate potential causal factors behind these changes. We test previous temporal assessments of the technocomplex at the local and regional level based on high-resolution quantitative data on HP lithic assemblages from Sibudu (KwaZulu-Natal) and comparisons with other southern African sites. At Sibudu, consistent unidirectional change in lithic technology characterizes the HP sequence. The results show a gradual reduction in typical HP markers such as the proportion of blades, backed pieces, and HP cores, as well as declining size of blades and backed artifacts. Quantitative comparisons with seven HP sites in South Africa suggest that lithic technology varies between regions over time instead of following similar changes. Concerning hypotheses of causal drivers, directional changes in lithic technology at Sibudu covary with shifting hunting patterns towards larger-sized bovids and a gradual opening of the vegetation. In contrast, variation in lithic technology shows little association with site use, mobility patterns or demographic expansions. Unlike at Sibudu, diachronic changes at other HP sites such as Diepkloof, Klasies River and Klipdrift appear to be associated with aspects of mobility, technological organization and site use. The regional diachronic patterns in the HP partly follow paleoclimatic zones, which could imply different ecological adaptations and distinct connection networks over time. Divergent and at times decoupled changes in lithic traits across sites precludes monocausal explanations for the entire HP, supporting more complex models for the observed technological trajectories.
... There has been considerable discussion of the drivers underlying technological variability through this period (Ambrose and Lorenz 1990;Wurz 1997;Ambrose 2002;McCall 2007;Mackay 2009;Powell et al. 2009;McCall and Thomas 2012;Ziegler et al. 2013;Mackay et al. 2014a, Soriano et al. 2015. While the focus of these arguments has largely been on the form of typical technological items, we consider evidence for changes in provisioning -effectively, the ways in which lithic technologies were delivered to their point of need -through the period from ~75 to ~50 ka. ...
... While there has so far been little discussion of provisioning systems in the Late Pleistocene of southern Africa, there has been some discussion of changing patterns of mobility (Ambrose and Lorenz 1990;McCall 2007;McCall and Thomas 2012). Perhaps the most influential of these is the Ambrose and Lorenz (1990) model of mobility during the Howiesons Poort. ...
... It seems probable that the commonly noted density of artifacts in the later Howiesons Poort is a consequence of place provisioning in the context of cool and humid conditions of mid to late MIS 4. Large numbers of cores from spatially restricted sources were transported to shelter sites in this industry and subsequently reduced from an initial state in which they still retained considerable cortical coverage. The fact that many of these retouched pieces were not maintainable suggests that they would have been suited to logistical and possibly task-specific trips (McCall 2007;Mackay 2009;McCall and Thomas 2012). In support of the artifact data, geoarchaeological evidence for site use suggests extended periods of fairly intensive occupation during the later Howiesons Poort (Goldberg et al. 2009;Miller et al. 2013;Karkanas et al. 2015), consistent with the use of sites as residential bases. ...
The later Middle Stone Age of southern Africa witnesses a number of important changes in lithic technology including the early appearance of bifacial point and microlithic systems. Though radiometric ages for these changes remain contested, they can in places be reconciled with elements of climatic variation. This paper examines the organization of provisioning systems through four successive industrial phases – the Still Bay, early Howiesons Poort, later Howiesons Poort, and post-Howiesons Poort – using data from rock-shelters and open sites. We show that the dominant means of technological delivery shifted from individual to place provisioning and back to individual provisioning through these industries, likely reflecting variation in humidity through the last glacial. We also show that the apparent abundance of sites and richness of assemblages in industries such as the Howiesons Poort may be in part a consequence of a research focus on rock-shelters; we found limited evidence for Howiesons Poort sites in the open. This is in contrast to the other industries, most clearly the Still Bay, for which we identified several large open-air gearing-up locations. Finally, we suggest that while interrogation of the archaeological record at the industry level is viable, it also masks behaviorally meaningful variation that should serve to encourage finer-scaled analyses.
... Direct, targeted, or preference-based procurement, may be for functional needs (e.g., Mackay, 2009;Minichillo, 2006;Oestmo et al., 2020;Stout, 2002), stylistic (e.g., Close, 2002;Mackay, 2011;Oestmo et al., 2020;Sackett, 1986), and/or symbolic (e. g., Oestmo et al., 2020;Wurz, 1999). Whereas embedded, encounter-based, or non-preference-based, procurement is contained within other subsistence activities and may change as the result of foraging range, demography, environment, or trade (e.g., Akerman et al., 2002;Ambrose and Lorenz, 1990;Brantingham, 2003;Brown, 2011;Klein et al., 1999;Kuhn, 1991;Kuhn, 2004;McCall, 2007;Torrence, 1983;Torrence, 1989;Volman, 1981;Wurz, 1999). Each of these can influence the raw materials selected and transported. ...
... The differential intensification within core reduction strategies is expected to vary between core forms, raw materials, and levels of mobility. The deployment of reduction strategies (i.e., Levallois, Still Bay points, blade technology) have been argued to correspond to the requirement of economisation of raw material and standardisation of form in response to raw material acquisition becoming more expensive (d'Errico et al., 2017;Kandel et al., 2015;Mackay et al., 2022;McCall, 2007;McCall and Thomas, 2012;Minichillo, 2006, though see Eren et al., 2008;Muller et al., 2017;Muller et al., 2022). This efficiency is achieved by manufacturing method that reduce the by-product material and increase the number of regular end products (i.e., blades and points) and the cumulative length of cutting edges (Brantingham and Kuhn, 2001;Eren et al., 2008;Jeske, 1987;Muller et al., 2022). ...
... Group identity and social networks are a hallmark of extant human societies and are ethnographically documented around the world, from computer-based social networks to those of modern hunter-gatherers (e.g., Wiessner, 1983). At their core, dispersed social networks foster co-reliance and the pooling of riskdobservations that have greatly impacted archaeology interpretations of Pleistocene artifacts (Gamble, 1982;McCall, 2007;Tostevin, 2012). Such work also showed the pitfalls of making assumptions based on technological similarities across assemblages. ...
... So far, the drivers of behavioral change that underlie the cultural evolution of modern humans have been left aside for the most part in this contribution. Models emerging in the last 20 years have variously cited environmental and climate change (McCall, 2007;Ziegler et al., 2013;Mackay et al., 2022), dietary factors (Parkington, 2001(Parkington, , 2010Marean, 2010Marean, , 2014, cognitive changes (Deacon and Wurz, 2001;Wynn and Coolidge, 2008) potentially caused by genetic mutations (Klein, 1994(Klein, , 2000Klein and Edgar, 2002), and changes in demography, communication networks, and social structures (Lahr and Foley, 1998;Jacobs et al., 2008;Powell et al., 2009;Sealy, 2016;Tryon and Faith, 2016) as potential causes. The most prominent explanations that account for the patterning of the MSA in the past generation while acknowledging its links with behavioral complexity are typically split between a more biologybased cognitive framework and a demographic view focused on population size and spatial distributions. ...
The behavioral origins of Homo sapiens can be traced back to the first material culture produced by our species in Africa, the Middle Stone Age (MSA). Beyond this broad consensus, the origins, patterns, and causes of behavioral complexity in modern humans remain debated. Here, we consider whether recent findings continue to support popular scenarios of: (1) a modern human 'package,' (2) a gradual and 'pan-African' emergence of behavioral complexity, and (3) a direct connection to changes in the human brain. Our geographically structured review shows that decades of scientific research have continuously failed to find a discrete threshold for a complete 'modernity package' and that the concept is theoretically obsolete. Instead of a continent-wide, gradual accumulation of complex material culture, the record exhibits a predominantly asynchronous presence and duration of many innovations across different regions of Africa. The emerging pattern of behavioral complexity from the MSA conforms to an intricate mosaic characterized by spatially discrete, temporally variable, and historically contingent trajectories. This archaeological record bears no direct relation to a simplistic shift in the human brain but rather reflects similar cognitive capacities that are variably manifested. The interaction of multiple causal factors constitutes the most parsimonious explanation driving the variable expression of complex behaviors , with demographic processes such as population structure, size, and connectivity playing a key role. While much emphasis has been given to innovation and variability in the MSA record, long periods of stasis and a lack of cumulative developments argue further against a strictly gradualistic nature in the record. Instead, we are confronted with humanity's deep, variegated roots in Africa, and a dynamic metapopulation that took many millennia to reach the critical mass capable of producing the ratchet effect commonly used to define contemporary human culture. Finally, we note a weakening link between 'modern' human biology and behavior from around 300 ka ago.
... Studies that apply models from optimal foraging theory to lithic analysis often evaluate the costs of transportation and lithic technological investment by exploring the variation in lithic assemblages relative to the distance individuals and material travel from a geological source to a central place. These applications are a logical extension of the theory, and have been met with success (Beck et al., 2002;Beck, 2008;Kuhn and Miller, 2015;McCall, 2007;Miller, 2018Miller, , 2018Miller, , 2018Rogers et al., 1994;Surovell, 2009a). Additionally, important work has used stone tools to understand behavioral responses to environmental change and the use-life of formal artifacts (Kuhn and Miller, 2015;McCall, 2007;Miller, 2018;Surovell, 2009b). ...
... These applications are a logical extension of the theory, and have been met with success (Beck et al., 2002;Beck, 2008;Kuhn and Miller, 2015;McCall, 2007;Miller, 2018Miller, , 2018Miller, , 2018Rogers et al., 1994;Surovell, 2009a). Additionally, important work has used stone tools to understand behavioral responses to environmental change and the use-life of formal artifacts (Kuhn and Miller, 2015;McCall, 2007;Miller, 2018;Surovell, 2009b). While both central place foraging and field processing have been used with success to describe regional scale changes in lithic conveyance, these models are limited by simplifying assumptions that occur at a regional rather than local scale and therefore do not capture important aspects of behavior (Beck et al., 2002;Beck, 2008;Shott, 2015). ...
Obtaining and transporting material for manufacturing flaked stone tools comes at a cost. Numerous studies evaluate how processing may reduce transport costs, often using models of optimal foraging theory such as central place foraging and field processing. However, to date these studies do not adequately address the continued reuse of toolstone through space and time, or the repeated use of toolstone by multiple individuals. To remedy this, we offer a novel theoretical framework for the conveyance of lithic material derived from the logic of the marginal value theorem. This framework explains changes in lithic acquisition, use, and discard in terms of changing environmental context. Specifically, this study examines the effect of distance from a geological source of lithic material on access to anthropogenic sources of lithic material, including previously discarded tools and cores, and quantifies these spatial patterns in terms of optimal processing before discard. We evaluate the strengths and weaknesses of past and current modeling approaches, and test predictions developed using the marginal value theorem through an artifact inventory and analysis of archaeological sites in the lower Dolores River canyon lands in southeastern Utah. The results of this case study support model predictions, showing that the degree of processing and use intensity represented in lithic assemblages increase in response to the decreasing quality and abundance of available lithic material that occurs with increased distance from the geological source. This theoretical framework offers some general insights that can explain variation in the distribution of lithic artifacts across diverse archaeological contexts.
... In addition to the apparent mass-production of points at Tweefontein, several smaller sites have both unifacial points and cores, at KOB20 and Uitspankraal 7, as well as numerous isolated Nubian cores observed in the eastern Tankwa Karoo. Unifacial points are typically regarded as having less curation potential than bifacial points (Dibble 1987;Kuhn 1990;Clarkson 2002) and reflecting less technological investment than more complex bifacial point or backed artefact orientated systems (McCall 2007). In the Tankwa Karoo, point production associated with Nubian technology shows curation of Nubian cores that were transported and discarded in highly reduced states, associated with transport of silcrete over distances exceeding 50 km. ...
... The MSA has been widely highlighted as a period of behavioural flexibility, with particular attention drawn to the Still Bay and Howiesons Poort (Henshilwood 2012;Kandel et al. 2016). While these industries undoubtedly show many signals of 'behavioural modernity' in the form of art, beads and complex technologies, currently there is no evidence that these strategies allowed prolonged occupation of the marginal Tankwa Karoo during MIS 4. In contrast, the post-Howiesons Poort, which has elsewhere been regarded as a period of devolution or cultural 'dark ages' (McCall 2007;Wadley 2010Wadley : 2404, shows novel behavioural strategies that appear to be specific to the Tankwa Karoo region. If this proposed temporal association is upheld, then the use of the Nubian Levallois technique to produce points demonstrates flexibility in adapting existing lithic traditions (unifacial points) to what are interpreted here as environmentally specific challenges. ...
Southern Africa is an ecologically highly varied region, yet many generalisations about past human behaviour are drawn from rock shelter sites in coastal and montane Fynbos Biome environments. The Tankwa Karoo region offers the opportunity to extend our
archaeological knowledge from the well-researched Western Cape into the arid interior Karoo in order to better capture behavioural variability and identify specific adaptations to more marginal conditions. This research presents the results of off-site surveys in the Tankwa Karoo, which spans the Cape to Karoo transition, mapping surface stone artefacts from the Earlier and Middle Stone Ages. The observed patterns in landscape use and lithic technology for each time-period were tested against a set of expectations based on previous research in the Western Cape and the Upper Karoo. The results indicate that in the Earlier Stone Age the most arid parts of the Tankwa Karoo saw only ephemeral use, with the better-watered mountain fringes preferred. In contrast, various strategies in the Middle Stone Age allowed groups to occupy these marginal parts of the landscape, including new kinds of technological behaviour suggestive of specific adaptations to this environment.
... Wadley (2001) and Henshilwood and Marean (2003) argue subsistence intensification linked to population increase as the main trigger for the incipient features of behavioral modernity. McCall (2007) and McCall and Thomas (2012) argued that the Howiesons Poort was a technological tradition that emerged as a response to environmental instability during Marine Isotopic Stage 4 and the demographic pressures in southern Africa at this time. This instability put pressure on the human population and, therefore, the impressive tech nological and symbolic innovations associated with this time period should be understood as related to new patterns of mobility, settlement systems, and foraging strategies. ...
... Following those industrial indicators, they conclude that foragers responded to glacial environmental conditions at Pinnacle Point site 5-6 with "increased population or group sizes, 'place provisioning', longer and/or more intense site occupations, and de creased residential mobility." This evidence from Pinnacle Point does not match with pre vious hypotheses that interpreted Howiesons Poort people as highly mobile (McCall 2007; McCall and Thomas 2012). ...
The Howiesons Poort is a technological tradition within the Middle Stone Age of southern
Africa. This technological tradition shows different characteristics, technical and symbolic (the engraving of ostrich eggshell containers, the appearance of engraved ochre, formal bone tool technology, compound adhesives for hafting and a great variability in hunting techniques), which only developed in an extensive manner much later in other parts
of the world. Therefore, the African Middle Stone Age through the material of the
Howiesons Poort holds some of the oldest symbolic and complex technologies documented in prehistory. For some researchers, the Howiesons Poort still represents an unusual
and ephemeral technological development within the Middle Stone Age, probably related
to environmental stress, and as such there are numerous hypotheses for it as an environmental adaptation, whereas for others, on the contrary, it implies that complex cognition,
deduced from the elaborated technology and symbolic expressions, was fully developed in
the Middle Stone Age.
... As expected from previous work (Mitchell 2008;Villa et al. 2010;Wadley 2010;Lombard and Parsons 2011;Gregor D. Bader and Manuel Will Mackay 2011;Wurz 2013;Mackay et al. 2014a) we could generally confirm that the archaeological signal of MIS 3 is diverse with high amounts of interassemblage and diachronic variability. This, however, does not imply that the record is unstructured or unsophisticated as has sometimes been claimed (Sampson 1974;Deacon 1989;McCall 2007;Mellars 2007;Jacobs et al. 2008a;Henshilwood 2012). ...
... Similar to recent research on individual assemblages (Soriano et al. 2007;Villa et al. 2010;Wadley 2010;Mackay 2011;Mohapi 2013) and larger-scale reviews (Mitchell 2008;Wurz 2013;Mackay et al. 2014a;Wadley 2015), we found an increased diversification in lithic technology with abundant diachronic variation within KZN in relation to the preceding and more homogeneous signal of the HP. Recent studies of MIS 3 stone artifact assemblages have provided evidence for both distinctive techno-typological signals and sophisticated knapping behaviors, falsifying previous assessments of "unstructured," "unsophisticated" or "conventional MSA" technologies (Sampson 1974;Singer and Wymer 1982;Deacon 1989;Henshilwood 2005;Mellars 2007;McCall 2007;Jacobs et al. 2008a). The multiple repetitive forms and distinctive reduction chains of unifacial points (Tongati, Ndwedwe, ACT; Conard et al. 2012;Will et al. 2014), diverse forms of bifacial points with production modalities differing from the SB (Bader et al. 2016; and the manufacture of morphometrically standardized blades executed by soft stone hammer percussion are examples from our work in KZN. ...
The Middle Stone Age (MSA) of southern Africa is central to current discussions on the early
behavioral evolution of modern humans. Recent MSA research has focused on two technocomplexes, the
Still Bay (SB) and Howiesons Poort (HP) that are associated with the early appearance of many cultural
innovations. Apart from this temporal emphasis, a regional focus of research on the southern and western
coasts of South Africa is largely due to taphonomic factors and research history. This research bias
constituted the starting point for two PhD dissertations at the University of Tübingen, whose main findings
are summarized here. The current contribution focuses on new results concerning lithic assemblages from
the understudied region KwaZulu-Natal during the lesser-known period of MIS 3, and provides a general
overview on recent Stone Age research by the University of Tübingen. Our main study site of Sibudu is a
key locality for the chrono-cultural stratigraphy of southern Africa due to its exceptional finds, excellent
preservation of organic materials, long sequence and secure chronology, though the site has long been
regionally isolated. Our research thus aimed to generate a comparative regional framework for the MSA
archaeology of KwaZulu-Natal, with the nearby – but mostly forgotten – sites of Holley Shelter and Umbeli
Belli as ideal case studies. The MIS 3 lithic assemblages of Sibudu following the HP provide evidence of
sophisticated knapping behaviors associated with technological innovations. Based upon clear technotypological
signals, these assemblages were used to define the “Sibudan” technocomplex. The large amount
of diachronic variability within the sequence is mostly due to the exceptionally high temporal resolution
for the MSA. Comparisons with Holley Shelter show many similarities, whereas site-specific differences
can be attributed to differential access to raw materials influencing techno-economic behaviors on small
scales. New archaeological work at Umbeli Belli provides insights on the technology and chronology for
the relatively unknown end of the MSA on the eastern seaboard of South Africa, the so-called “final MSA.”
Our research suggests that the archaeology of MIS 3 in southern Africa can be characterized by persistent
cultural complexity after the HP, with a high degree of regional variability and dynamic change through
time. These results have important implications for models of the early behavioral evolution of Homo
sapiens. We conclude with outlining future directions of research by the University of Tübingen in the MSA
of South Africa which intend to extend the spatio-temporal scope of the work presented here.
Keywords: South Africa; Middle Stone Age, MIS 3, lithic technology, variability
... The coming-and-going of these elements may have several underlying explanations (Wurz, 2013). They may reflect changes in social/territorial organization in response to changing foraging opportunities (McCall and Thomas, 2012;Marean, 2016), subsistence risk (McCall, 2007), or changes in the size, stability and/or integration of populations (Powell et al., 2009;Premo and Kuhn, 2010;Mackay et al., 2014;Premo, 2016). ...
... The first focuses on intrinsic factors such as neurogenetic changes (Klein, 2000), population size (Powell et al., 2009;Premo and Kuhn, 2010), the emergence of modern language and working memory (Noble and Davidson, 1996;Deacon and Wurz, 2001;Wynn and Coolidge, 2007), and the effects of cultural transmission (Boyd and Richerson, 1985;Rogers, 1995;Henrich, 2001;McElreath et al., 2008;Kolodny et al., 2016). The second approach emphasises the role of external stimuli such as subsistence risk (Henshilwood and Marean, 2003;McCall, 2007), the introduction of new foods with implications for brain development , subsistence controls on social organization (Marean, 2014), and environmental change (Basell, 2008;Ziegler et al., 2013). ...
The Late Pleistocene Middle Stone Age (MSA) record of Africa provides early examples of standardised stone tool production and complex manufacturing sequences, superficially implying a long-term trend towards greater complexity in MSA technology at a continental scale. However, at this scale, spatial and temporal expressions of technological complexity are uneven. New lithic and chronometric data from the East–Central African record add further regional perspective to these patterns. Stone artefact assemblages from Karonga, northern, Malawi (92–22 ka), persistently lack the complexity demonstrated elsewhere in Africa at the same times, despite similar lithic raw materials. These new data provide an essential avenue for exploring hypotheses about the roles of environmental risk and demography in shaping the expression of MSA technology across the continent, not just at a local scale. When set within this framework, the simplicity of the Karonga MSA is best explained by its position in an environment that was persistently low in relative extrinsic subsistence risk. These results reinforce that motivations to invest in complex tools were variable through space and time, and that this variation, more than factors relating to behavioural capacity, may explain the patchy evidence for lithic complexity in the later MSA.
... Much of the diagnostic MSA surface evidence took the form of radial cores (including recurrent centripetal Levallois and discoidal cores), preferential Levallois points and flakes, flakes with faceted platforms and blades (Table 2; Figure 7B). These reflect a persistent MSA presence and, although these artefacts can only be generalised as MSA, the use of fine-grained raw materials such as silcrete is a widespread trend in the later MSA industries (Minichillo 2006;McCall 2007;Villa et al. 2009). Whilst the potentially earlier MSA assemblages on the Olifants River primarily use quartzite, silcrete is overwhelmingly the most commonly used later MSA material. ...
... Unifacial points themselves are morphologically and technologically more varied (e.g. Conard et al. 2012) and represent a lower-investment technological system than bifacial points or backed artefacts, something sometimes argued to reflect reduced technological complexity in the post-Howiesons Poort (McCall 2007;Mellars 2007;Jacobs and Roberts 2009;cf. Lombard andParsons 2010, 2011). ...
Stone Age surface assemblages are all too often neglected in favour of stratified, datable cave sequences, thus overlooking important insights into changing behavioural patterns at a broader scale. The Olifants River Valley (Clanwilliam, Western Cape Province, South Africa) presents a rich surface lithic record alongside excavated rockshelter occupations from the early Middle Stone Age (MSA) to the Later Stone Age (LSA). Surface surveys in the Olifants River Valley mapped temporally diagnostic artefacts and their association with different topographic features in order to investigate past landscape use. Our approach refers to a hypothesis proposed by Hilary Deacon, framing the MSA within the context of earlier and later patterns of behaviour. Based on observations from sites across South Africa, Deacon described Earlier Stone Age (ESA) landscape use as ‘stenotopic’, with a narrow focus on permanent water sources, and LSA landscape use as ‘eurytopic’, using a much broader range of habitats but specifically occupying rockshelters as domestic sites. Deacon suggested that the intervening MSA, in its later stages, shows a pattern that anticipated LSA landscape use. We apply Deacon's model to the study area, observing distinctive preferences for certain locations and raw materials and approaching changing patterns of artefact discard from a technological perspective.
... Several key topics in the study of hunter-gatherer behaviour and organisation have been explored in different geographic regions and chronological periods through raw material analysis, such as modalities of procurement and mobility strategies (Ambrose & Lorenz, 1990;Binford, 1979;Binford & Stone, 1985;Gould, 1985;Gould & Saggers, 1985;Kuhn, 1991;McCall, 2007), occupation types and their duration (Kuhn, 2004;Surovell, 2009), and the establishment and dimension of social networks (Whallon, 2006), as well as exchanges between groups or individuals (Gamble, 1999). These analyses are often achieved by systematically characterising geological and archaeological raw materials and establishing correlations between samples from both origins. ...
Analyses of raw materials and the distinction between local/regional and long-distance sources have proven invaluable for understanding the extensive movements, interactions, and social networks during the Upper Palaeolithic in the Iberian Peninsula. However, unlike other parts of Iberia, research on the management and acquisition of raw materials in the south and west of Iberia remains relatively underdeveloped. Despite significant knowledge about the technological practices of Palaeolithic hunter-gatherers from southern Portugal, particularly from studies conducted at the site of Vale Boi, there is a noticeable lack of focus on raw materials management. This paper presents the first comprehensive characterisation of chert raw materials from the Gravettian, Proto-Solutrean, and Solutrean occupations at Vale Boi, using both macroscopic and petrographic techniques. Our study reveals that the majority of chert found at Vale Boi originates locally, within a 20 km radius. However, a non-negligible portion of the chert comes from non-local sources, indicating > 200 km raw material circulation from central Portugal and southern Spain.
... Various authors have suggested that core tools act as a logical means of conserving and maximally utilizing raw material in unfamiliar or peripheral habitats due to their flexibility and minimal repair costs (e.g. Parry and Kelly, 1987;Kelly and Todd, 1988;McCall, 2006McCall, , 2007Grove et al., 2015). Together, these artefact forms may have acted as an effective risk mitigation strategy for highly mobile populations across more peripheral areas of the landscape. ...
... While for a time perceived in deliberate contrast to MIS 4 technology such as the Still Bay and Howiesons Poort and thought to be characterised by limited behavioural complexity and with little relevance to broader questions of human cultural evolution (Deacon, 1989;Henshilwood, 2005;McCall, 2007;Singer & Wymer, 1982), a new focus on MIS 3 assemblages in southern Africa in the recent years has changed this viewpoint. Studies from across the sub-continent have shown that complex lithic and non-lithic material culture continued after the Howiesons Poort (Bader et al., 2022a;Conard et al., 2012;d'Errico et al., 2012;Kandel et al., 2016;Lombard & Parsons, 2010, 2011Mackay, 2011;Villa et al., 2010;Wadley, 2015;Will & Conard, 2018) with the main signal being one of regionalisation (Bader et al., 2015(Bader et al., , 2022bde la Pena et al., 2022;Will et al., 2014) or fragmentation (Mackay et al., 2014a) in the archaeological record. ...
Southern Africa features an intensively studied Stone Age sequence, though one with geographical and temporal gaps. The archaeology of Marine Isotope Stage (MIS) 3 remains understudied, particularly between ~ 50 and 25 ka. This period encompasses important ecological, demographic and cultural changes, most notably the transition from Middle Stone Age (MSA) to Later Stone Age (LSA) technologies. In western South Africa, previous research postulated a demographic hiatus during the second half of MIS 3, potentially due to hyperarid climatic conditions. Here, we provide evidence of occupation during this period at Mertenhof Rock Shelter (MRS) in the form of new chronometric and technological data. OSL estimates suggest two pulses of low-intensity occupations at ~ 50 ka and 41–37 ka, allowing for a diachronic assessment of technological changes. These sporadic MSA occupations complement the more widespread occurrence of open-air settlements along the Doring River during ~ 50–35 ka. At MRS, knappers procured local rock types and produced small flakes and some laminar elements via platform, bipolar and Levallois reduction. The retouched elements feature splintered pieces and denticulates but mostly lack points. Differences to contemporaneous sites in eastern southern Africa underscore ongoing technological regionalisation and demographic partitioning during MIS 3. The temporal changes in the sequence show some antecedents of Early LSA technological systems, which appear in the region around 25 ka, but not in a unidirectional manner. Lithic and chronometric evidence from MRS supports scenarios of a long MSA persistence within MIS 3 in southern Africa and a late emergence of the LSA sometime after 35 ka.
... Sub-divisions of the South African Stone Age are based on the composition and to an extent the distribution of archaeological 'industries' at this scale (Goodwin and van Riet Lowe, 1929;Lombard et al., 2022). Patterns in the distribution of sites from different industries may be used to make inferences about the systems of land use (Kandel and Conard, 2012;McCall, 2007) or adaptive focus of people during the time-periods they represent (d' Errico et al. 2017). ...
Individuals are considered the primary agents responsible for introducing objects into the archaeological record through discard. However, the intricate spatial distribution of artefacts within archaeological contexts is complex, being influenced not only by individual actions, but also by the aggregation of individual behaviours, temporal dynamics, and post-depositional processes. This study employs spatial data on stone tools from accumulating open-air localities in the Doring River catchment, using R and Geographic Information Systems, to explore the scales at which meaningful information can be extracted from these open-air sediment bodies. Although statistical analyses of the spatial data reveal a correlation between the distribution of artefacts and the geomorphology of the locality, it is evident that the patterning cannot solely be attributed to geomorphological factors. The findings from the study suggest the representation of various discrete temporal and spatial scales of behaviour at these sites, ranging from the individual to the broader ‘collective of systems’ scale. This diversity persists even in scenarios where temporally constrained artefacts are being lagged onto a single ancient surface. The outcomes highlight the potential of open-air sites in providing insights into the complexities of human-environment interactions.
... Thus, changes in the frequencies of raw materials within the archaeological records may provide evidence for changes in that organization, or even resilience of specific choices, all of which can reflect culturally transmitted preferences within a group of hunter gatherers [43]. Several models, both formal and informal, have shown that changes of raw material in the archaeological record may reflect different procurement strategies [44][45][46][47], either related to mobility strategies [48][49][50][51] or changes in the availability of raw materials, possibly related to environmental change [43,52]. Raw materials are also closely linked to the tools produced with them-the costs of manufacturing technology can be related to the availability of raw materials in the landscape [53][54][55][56], or the characteristics of the raw materials which might relate to functionality [57][58][59], through the choice of raw materials for specific technologies [43]. ...
Southwestern Iberia has played a key role in characterizing Late Pleistocene human ecodynamics. Among other aspects of human behavior, chert procurement and management studies in this region have received increasing attention in the past two decades, especially focusing on the sites showing repeated human occupation, such as the case of Vale Boi (Southern Portugal). However, these studies have been very limited in their geographical scope, and mostly focused on brief macroscopic descriptions of the raw materials. To further our knowledge of the relationship between regional availability of raw materials and its impact on human adaptations and mobility, a more detailed approach to characterizing geological sources is needed. This paper characterizes chert raw materials location, diversity, and availability in a geologically well-defined region of southern Portugal ‐ the Algarve. Through macroscopic and petrographic approaches, we provide a detailed characterization of geological chert sources to build a frame of reference for chert exploitation in the region. Our results show that there are four main chert formations in Algarve, and that despite the within-source variability, sufficient differences at macroscopic and petrographic levels are present to allow clear source attribution. These results provide a baseline for raw material studies in archaeological assemblages across southwestern Iberia, that will be essential to further characterize the dynamics of human behavior in some of the most important eco-cultural niches.
... Some researchers consider that the post-HP is represented in the South African archaeological record by a decrease in lithic technological complexity (e.g. Villa et al., 2005;McCall, 2007, but see Lombard and Parsons, 2011;Dusseldorp, 2014) attributing the gradual changes to a progressive shift in the technical system that entailed the development of innovations in behavioural domains, such as bone tools, hafting, adhesives, ornaments or wooden tools. Others suggest that this was a period of change in economic strategies, patterns of mobility, and social organization that were driven by changes in global climate, demography and/or resource structure (Lombard and Parsons, 2011;Dusseldorp, 2014;Will, 2019). ...
Border Cave is a well-known South African Middle and Early Later Stone Age site located in KwaZulu-Natal. The site has exceptional plant preservation, unparalleled in the African Middle Stone Age archaeological record. This study focuses on the phytolith and FTIR analysis of two Members (2 BS and 2 WA) of the under-documented post-Howiesons Poort occupations dating to~60 ka. These members contain complex successions of vertically overlapping, interdigitating light brown sediments, plant bedding and combustion features of various sizes. The complexity and distinctiveness of these deposits provide an excellent opportunity for the study of plant exploitation strategies and their associated human behaviour. Our taphonomic assessment inferred, through the variability of phytolith properties and minerals composing archaeological layers, that specific occupations suffered more physical weathering than others, for example in the form of trampling. The preservation of fragile and highly soluble phy-toliths (eudicot leaf phytoliths) and the high frequencies of articulated phytoliths indicates that some bedding deposits experienced little disturbance after their deposition. Not all bedding layers dating to ⁓60 ka show, from a phytolith perspective, the same plant composition, which could be explained in terms of changes in human preference for the use of plants over time to construct bedding or because distinct types of living floors are represented. Finally, the systematic application of phytoliths and FTIR to the complex archaeological sequence of Border Cave confirm these analyses can be used in the future to identify bedding deposits not visible to the naked eye, and behavioural patterns obscured by diagenetic or biased processes during sampling.
... Thus, changes in the frequencies of raw materials within the archaeological records may provide evidence for changes in that organization, or even resilience of specific choices, all of which can reflect culturally transmitted preferences within a group of hunter gatherers [43]. Several models, both formal and informal, have shown that changes of raw material in the archaeological record may reflect different procurement strategies [44][45][46][47], either related to mobility strategies [48][49][50][51] or changes in the availability of raw materials, possibly related to environmental change [43,52]. Raw materials are also closely linked to the tools produced with them-the costs of manufacturing technology can be related to the availability of raw materials in the landscape [53][54][55][56], or the characteristics of the raw materials which might relate to functionality [57][58][59], through the choice of raw materials for specific technologies [43]. ...
Southwestern Iberia has played a key role in characterizing Late Pleistocene human ecodynamics. Among other aspects of human behavior, chert procurement and use studies in this region have received increasing attention in the past two decades, especially focusing on the sites showing repeated human occupation, such as the case of Vale Boi (Southern Portugal). However, these studies have been very limited in their geographical scope, and mostly focused on brief macroscopic descriptions of the raw materials. To further our knowledge of the relationship between regional availability of raw materials and its impact on human adaptations and mobility, a more detailed approach to characterizing geological sources is needed. This paper characterizes chert raw materials location, diversity, and availability in a geologically well-defined region of southern Portugal - the Algarve. Through macroscopic and petrographic approaches, we provide a detailed characterization of geological chert sources to build a frame of reference for chert exploitation in the region. Our results show that there are three main chert formations in Algarve, and that despite the within-source variability, sufficient differences at macroscopic and petrographic levels are present to allow clear source attribution. These results provide a baseline for raw material studies in archaeological assemblages across southwestern Iberia, that will be essencial to further characterize the dynamics of human behavior in some of the most important eco-cultural niches.
... Some researchers consider that the post-HP is represented in the South African archaeological record by a decrease in lithic technological complexity (e.g. Villa et al., 2005;McCall, 2007, but see Lombard and Parsons, 2011;Dusseldorp, 2014) attributing the gradual changes to a progressive shift in the technical system that entailed the development of innovations in behavioural domains, such as bone tools, hafting, adhesives, ornaments or wooden tools. Others suggest that this was a period of change in economic strategies, patterns of mobility, and social organization that were driven by changes in global climate, demography and/or resource structure (Lombard and Parsons, 2011;Dusseldorp, 2014;Will, 2019). ...
Border Cave is a well-known South African Middle and Early Later Stone Age site located in KwaZulu-Natal. The site has exceptional plant preservation, unparalleled in the African Middle Stone Age archaeological record. This study focuses on the phytolith and FTIR analysis of two Members (2 BS and 2 WA) of the under-documented post-Howiesons Poort occupations dating to~60 ka. These members contain complex successions of vertically overlapping, interdigitating light brown sediments, plant bedding and combustion features of various sizes. The complexity and distinctiveness of these deposits provide an excellent opportunity for the study of plant exploitation strategies and their associated human behaviour. Our taphonomic assessment inferred, through the variability of phytolith properties and minerals composing archaeological layers, that specific occupations suffered more physical weathering than others, for example in the form of trampling. The preservation of fragile and highly soluble phy-toliths (eudicot leaf phytoliths) and the high frequencies of articulated phytoliths indicates that some bedding deposits experienced little disturbance after their deposition. Not all bedding layers dating to ⁓60 ka show, from a phytolith perspective, the same plant composition, which could be explained in terms of changes in human preference for the use of plants over time to construct bedding or because distinct types of living floors are represented. Finally, the systematic application of phytoliths and FTIR to the complex archaeological sequence of Border Cave confirm these analyses can be used in the future to identify bedding deposits not visible to the naked eye, and behavioural patterns obscured by diagenetic or biased processes during sampling.
... Factors such as the capacity for in-depth planning, communication and the potential for commodity exchange between groups may also affect the choice of raw materials transported and their variation, as knowing that suitable stone is available in an area (through direct or indirect means) may lessen the need for transport from elsewhere (e.g. Meltzer, 1989;Merrick et al., 1994;Ambrose, 2006;McCall, 2007;Brown, 2011;Aubry et al., 2012;Porraz et al., 2013;Wilkins, 2017). Foraging strategies, group mobility and seasonal cycles of human movement through landscapes affect both the geography of raw material procurement and who is involved in that procurement (e.g. ...
Analyses of the distance over which lithic raw materials were transported for use in stone tool production provide important insights into early human mobility through prehistoric landscapes. This study combines the use of geochemical provenancing, chaîne opératoire analysis and geochronology to examine patterns of lithic raw material procurement at five single-use open-air Middle Stone Age (MSA) archaeological sites in Ntwetwe Pan, part of the Makgadikgadi Pans complex in north-central Botswana. Maximum ages of the five sites ranged from 106 ± 3 to 69 ± 7 ka, with site formation thought to have occurred before and after a lake high stand dated to c. 72-57 ka. Tool manufacture at all sites was largely confined to the production of MSA points, with silcrete used exclusively as the raw material. Geochemical provenancing investigations aimed to identify the specific silcrete outcrops used as lithic raw material sources. Analysis of contemporary pan floor deposits show that sediment (and hence silcrete) geochemistry in Ntwetwe is determined by the proportional sediment input into the pan from fluvial systems with different catchment geologies. Immobile trace element signatures for 46 waste manufacturing flakes were compared against equivalent data for 321 silcrete samples collected at outcrops within and beyond Ntwetwe Pan. Waste flakes were chosen to be representative of the main silcrete raw material types present within the artefact assemblage at each site. Fifteen waste flakes were shown to match specific outcrops on the basis of their geochemical signatures and petrographic properties; all matching outcrops were within Ntwetwe Pan, at distances ranging from 7 to 55 km from individual sites. Multi-site analysis of procurement patterns identifies common silcrete source areas, revealing a preference for silcrete from particular locations within Ntwetwe Pan. Given that the five archaeological sites were likely occupied at different times, this resource preference may have been a longer-term behavioural feature of MSA populations in the Ntwetwe region. The distances over which silcrete was transported in Ntwetwe Pan are smaller than identified in investigations at similar-aged MSA sites in northwest Botswana. The reasons for the different silcrete procurement ranges in the two regions are likely related to silcrete availability and/or raw material preference, but this requires further investigation.
... The reasons behind these complex, discontinuous and non-linear trajectories of cultural change on the African continent are not well-understood. Assuming comparable cognitive capabilities, they might result from a complex interplay between shifting patterns of mobility, risk management and raw material procurement (Torrence, 1983;Ambrose and Lorenz, 1990;Brantingham, 2003;McCall, 2007;McCall and Thomas, 2009), but also demographic dynamics in structured populations (Crevecoeur et al., 2016;Miraz on Lahr, 2016;Scerri et al., 2018) differential uptake and transmission of innovations (Boyd and Richerson, 1985;Cavalli-Sforza and Feldman, 1981;Derex et al., 2013;Henrich, 2001;H€ ogberg and Lombard, 2020;Kolodny et al., 2015;Rogers, 1995), or fitness-enhancing adaptations to ever-changing social and environmental conditions (Blome et al., 2012;Chase, 2010;d'Errico and Banks, 2013;Will et al., 2019). ...
The MSA/LSA transition is a major shift in the African archaeological record, but questions on its beginning remain debated. In southern Africa, most sites suggest an origin of LSA technology after about 30.000 years BP. The single exception is Border Cave situated at the border between South Africa and Eswatini, with surprisingly old dates of ∼43.000 BP associated with an LSA-like bipolar quartz assemblage. While many researchers now consider Border Cave to represent the origin of the LSA in southern Africa, these findings lack proper contextualization with regional lithic and chronometric data. Here we pursue the question whether Border Cave provides firm evidence for the source of LSA technology that later spread to the rest of southern Africa. To test between different hypotheses, we provide new chronometric and lithic data from the site of Sibebe, situated in the highveld of Eswatini only 100 km distant to Border Cave, and contextualize these results with nearby localities. Eswatini represents an ideal study area as it features many excavated sites but remains heavily understudied, rarely appearing in comparative MSA/LSA research. Our analyses at Sibebe identify two distinct groups of MSA lithic assemblages dated to between 43.000 and 27.000 cal BP by C14, overlain by a late Holocene LSA industry. The latest MSA expression at Sibebe features finely shaped unifacial and bifacial points without trends towards LSA technology. A comparative review of sites in Eswatini, South Africa, and Mozambique confirms similar MSA industries post-dating 30.000 BP but finds no evidence for LSA technologies before ∼27.000 BP. These findings suggest that Border Cave cannot mark the origin of the much later LSA in southern Africa, but rather signifies an early set of locally specific behavioral innovations that appeared and disappeared again. These findings have important implications for the spread of new technologies and our understanding of cultural evolutionary trajectories in southern Africa and beyond.
... It is also a scalar stress-reduction behavior, and in this sense, the fission and dispersion of hunter-gatherers can also be seen as examples of social spacing (Johnson 1978(Johnson , 1982Freeman and Anderies 2015;Kummer 1970;Grove et al. 2012;Richerson and Boyd 1999;Zhou et al. 2005). In archaeology, spacing behaviors have been traditionally studied in relation to territoriality, although the focus of research on territoriality has varied depending on perspective and context, and the multidimensionality of this concept has long been recognized (Cashdan 1983, Dyson-Hudson andSmith 1978;Kelly 1995Kelly , 2013Layton 1986;Lee 1972;McCall 2007;Moritz et al. 2020;Peterson 1975;Wilmsen 1973). It should be noted that while some early studies have used site catchment and mobility range interchangeably with territory (Binford 1980;Higgs and Vita-Finzi 1972;Vita-Finzi et al. 1970), these terms are concerned mainly with individual bands' access to resources without giving consideration to the existence of other bands. ...
While adaptive responses to ecological settings have been the focus of traditional approaches to the spatial organization of mobile hunter-gatherers, social factors also affect the positioning of bands. Hunter-gatherers position themselves in locations not just to exploit food resources, but also to maintain a certain distance to neighboring bands. Hunter-gatherer spatial organization was an agglomerated consequence of balancing two behaviors: spacing and proximizing. Thus, any given band’s decision to relocate affects other bands’ positioning, possibly resulting in a domino effect on a regional scale. We explain population fluctuations in Korea from the Last Glacial Maximum (LGM) to the early Holocene. The population history of southern Korea is characterized by an increasing occupational density during the LGM and population decline in periods of climatic amelioration. Contrasting this pattern to the population fluctuations observed in the northern latitudes of continental East Asia, we suggest that population increase in southern Korea during the LGM resulted from the southward movement of a wider hunter-gatherer network. As sea levels rose during the post-LGM, the network moved to the north and bands on the southern Korean peninsula moved north to avoid isolation. This process explains depopulation on the peninsula during the post-LGM and early Holocene.
... Yet, a similar focus on the role of "fine-grained" and often non-local raw materials (silcrete, in particular) can be observed in the past decades, mirroring some of the observations from Europe. The procurement and the use of silcrete have been associated with specific techno-complexes, increased levels of mobility and ranging patterns, technological innovations such as heat-treatment, formalized technologies such as backing, bifacial and pressure flaking, and even symbolic behavior (Ambrose & Lorenz, 1990;Brown et al., 2012;Henshilwood et al., 2001;Lombard et al., 2012;Mackay et al., 2014;McCall, 2007;Mourre et al., 2010;Schmidt et al., 2013;Singer & Wymer, 1982;Will & Mackay, 2017;Wurz, 1999). Other, mostly local, raw materials such as quartzite are frequent in many assemblages (e.g., Elands Bay Cave, Klasies River, Pinnacle Point 13B, and Die Kelders; Grine, et al., 1991;Schmid, et al., 2016;Singer & Wymer, 1982;Thackeray, 2000;Thompson et al., 2010;Volman, 1981;Wurz, 2002) but have rarely been at the center of scientific debates (but see Schmid et al., 2016). ...
The study of raw materials is an essential step in lithic analysis, regardless of the age, provenance, and technology of the assemblages. As in many other contexts of the Paleolithic, researchers of the Middle Stone Age (MSA) in southern Africa have often focused their attention on fine-grained, non-local rock types, such as silcrete. Here, I spotlight raw materials considered to be of lower suitability for knapping and frequently acquired from local sources. Due to their coarse-grained nature, artifacts from rock types such as calcrete, sandstone, and quartzite might show attributes that are different from finer-grained materials. Some of these knapped stones even constitute the substrate of the sites they are from, at times resulting in their neglect or not being recognized as anthropogenic artifacts. Knapped vein quartz features sharp and durable edges, but its complicated fracture mechanics hamper comparative analysis and provide methodological challenges. In this study, raw materials from different transport distances and with different presumed qualities are compared in terms of their roles in MSA lithic technology and settlement patterns. In the first step, the article focuses on the open-air special-purpose camp of Hoedjiespunt 1 (HDP1, Western Cape) and the rockshelter residential site of Sibudu (KwaZulu-Natal), especially on assemblages dated between ~ 130–100 and ~ 58 ka. Subsequently, I review relevant materials for the southern African MSA. At HDP1 and Sibudu, local raw materials of lower knapping suitability assume several roles, from the “staple” material for all manufacturing stages to special-purpose and “add-on” functions. In the broader southern African region, MSA knappers also used these rock types in a flexible manner with gradual differences but also similarities to their use of finer-grained raw material. These differences depend on a complex interaction of raw material availability, differential site use, and the position of the localities in the settlement system.
... Subsistence intensification can be framed within OFT and may be defined as the extraction of increased energy from food resources at the expense of foraging efficiency (Schoener 1974;Munro 2009: 141). Intensification occurs when over-exploitation caused by increasing population pressure (Flannery 1969;Stiner et al. 1999;Munro 2009;Jerardino 2010) or environmental degradation (Henshilwood and Marean 2003;McCall 2007) results in the depletion of higher-ranked food resources such as large herbivores. Intensification has been linked to increases in the exploitation of lowerranked small fauna such as hare, rabbits and birds (Stiner et al. 2000) and may be closely linked to higher occupations during the Later Pleistocene in southern Africa (Clark 2011;Reynard and Henshilwood 2017). ...
Occupational intensity is a common theme in current research and has been linked to significant demographic trends in the past. The Late Pleistocene in the southern Cape may be especially important in understanding the impacts of socio-demographic change given its association with developments in 'modern' human behaviour. The ubiquity of archaeo-faunal remains at Middle Stone Age (MSA) sites makes these convenient datasets for documenting site-specific occupational patterns. In this paper, zooarchaeological and taphonomic data are evaluated as proxies for occupational intensity, and occupational trends are explored in the southern Cape. Zooarchaeological and taphonomic data from three southern Cape MSA sites-Klipdrift Shelter, Blombos Cave and Pinnacle Point-are compared with previously determined higher and lower occupational levels within each site to assess the value of these proxies in tracking temporal changes in settlement intensity. The results show that, while frequencies of small mammals and larger ungulates often covary with occupational levels, these are problematic indicators because of the impact of carnivores. Similarly, faunal diversity generally corresponds well with increasing human occupations but is a problematic proxy because of the effects of animal activity. Anthropogenic bone surface modifications appear to be effective in tracking occupational patterns, with trampling a particularly useful indicator. Faunal and shellfish density, and transverse bone fracture patterns, are valuable proxies of occupational intensity at all sites. Generally, the data suggests close links between occupational intensity at these sites and marine transgressions. Evidence of increased exploitation of small game in the later MSA may imply periods of subsistence intensification possibly linked to increased demographic pressure during Marine Isotope Stage 4.
... The variables contributing to the structure of the southern African archaeological record through the late Pleistocene have provoked much debate, with neural (Parkington, 2001;Klein, 2008), environmental (Deacon, 1989;McCall, 2007;Ziegler et al., 2013), subsistence-settlement (Marean, 2011(Marean, , 2016, and demographic (Jacobs and Roberts, 2009;Powell et al., 2009;Mackay et al., 2014) factors, as well as combinations thereof (Henshilwood and Dubreuil, 2011), all suggested as causal. While this discourse will and should continue for some time, the combined evidence from MIS 5 outlined above hints at a phase of demographic dynamism. ...
Multidisciplinary research suggests that Marine Isotope Stage 5 (~130–74 ka) was an important evolutionary stage in African deep history. Population expansion and growth spurred changes in material culture as well as the exploration of previously unoccupied regions and ecosystems. The archaeological sequence at Melikane Rockshelter (1860 masl) in the Maloti-Drakensberg Mountains of highland Lesotho, southern Africa, stretches from the late Holocene back to sub- stage 5a, ~80 ka. The site’s earliest strata represent one of the earliest known examples of a sustained human presence in high mountain systems worldwide. This paper deals with the lithic assemblages from those levels, which are currently the oldest radiometrically dated archaeology in Lesotho and one of the few stratified assemblages of Last Interglacial age in the southern African interior. The results of a typo-technological analysis of the assemblages are presented. They suggest that the afromontane foragers who resided at Melikane employed both blade-focussed and bipolar flaking systems, curated a maintainable toolkit suited to frequent residential moves, and used a hybrid provisioning system adapted to their immediate environment. Comparisons with other late Last Interglacial assemblages across the subcontinent suggest that highland populations at this time were largely disconnected from their lowland counterparts. This implies that as Last Interglacial populations in southern Africa expanded into new environments, they also fragmented, adapting to local conditions rather than adhering to a universal technological system.
... These new data contrast with earlier hypotheses that suggest that both Still Bay and Howiesons Poort industries appear during arid (e.g. Ambrose & Lorenz, 1990;McCall, 2007) or wet (Chase, 2010) conditions previously inferred for MIS 4 in southern Africa. Thus, unstable environments with repeated habitat fragmentation, isolation and admixture seems to be optimal places for cultural and biological evolution of Homo leading to the multiregional origin of H. sapiens (Scerri et al., 2018). ...
The traditional concept of long and gradual, glacial-interglacial climate changes during the Quaternary has been challenged since the 1980s. High temporal resolution analysis of marine, terrestrial and ice geological archives has identified rapid, millennial-to centennial-scale, and large-amplitude climatic cycles throughout the last few million years. These changes were global but have had contrasting regional impacts on the terrestrial and marine ecosystems, with in some cases strong changes in the high latitudes of both hemispheres but muted changes elsewhere. Such a regionalization has produced environmental barriers and corridors that have probably triggered niche contractions/expansions of hominin populations living in Eurasia and Africa. This article reviews the long-and short-timescale ecosystem changes that have punctuated the last few million years, paying particular attention to the environments of the last 650,000 years, which have witnessed key events in the evolution of our lineage in Africa and Eurasia. This review highlights, for the first time, a contemporaneity between the split between Denisovan and Neanderthals, at 650-400 ka, and the strong Eurasian ice-sheet expansion down to the Black Sea. This ice expansion could form an ice barrier between Europe and Asia that may have triggered the genetic drift between these two populations.
... Until recently, interest in the MIS 4 Still Bay and Howiesons Poort technocomplexes of the South African MSA has eclipsed the study of the subsequent post-Howiesons Poort and final stages of the MSA in MIS 3 [11,98,[153][154][155][156]. Initial suggestions that human behaviour experienced a devolution, regression or behavioural reversal following the innovative bursts seen in MIS 4 are no longer upheld [157][158][159] and the period is now generally viewed as reflecting shifts in technological organisation and adaptive strategies [4,115,160,161]. The climate of MIS 3 was not uniformly characterised by hyper-aridity as is sometimes stated [162][163][164], instead seeing rapid fluctuations and considerable variability in South Africa's different biomes [11]. ...
The Middle Stone Age record in southern Africa is recognising increasing diversity in lithic technologies as research expands beyond the coastal-montane zone. New research in the arid Tankwa Karoo region of the South African interior has revealed a rich surface artefact record including a novel method of point production, recognised as Nubian Levallois technology in Late Pleistocene North Africa, Arabia and the Levant. We analyse 121 Nubian cores and associated points from the surface site Tweefontein against the strict criteria which are used to define Nubian technology elsewhere. The co-occurrence of typically post-Howiesons Poort unifacial points suggests an MIS 3 age. We propose that the occurrence of this distinctive technology at numerous localities in the Tankwa Karoo region reflects an environment-specific adaptation in line with technological regionalisation seen more widely in MIS 3. The arid setting of these assemblages in the Tankwa Karoo compares with the desert context of Nubian technology globally, consistent with convergent evolution in our case. The South African evidence contributes an alternative perspective on Nubian technology removed from the ‘dispersal’ or ‘diffusion’ scenarios of the debate surrounding its origin and spread within and out of Africa.
... Among the dozen or so southern African Middle Stone Age (MSA) sites with human fossils that date to Marine Isotope Stage (MIS) 6e3 (Grine, 2016), KRMS has featured prominently in discussions of the emergence of modern human behavior and morphology (Grine et al., 2017a). This is owing to its rich artifactual and faunal records (e.g., Klein, 1976Klein, , 1989Singer and Wymer, 1982;Thackeray and Kelly, 1988;Thackeray, 1989;Turner, 1989;Deacon, 1992Deacon, , 2008Klein and Cruz-Uribe, 1996;Milo, 1998; Bartram and Marean, 1999;Klein et al., 1999;Wurz, 1999Wurz, , 2002Wurz, , 2008Wurz, , 2012van Pletzen, 2000;Wurz et al., 2003;von den Driesch, 2004;Deacon and Wurz, 2005;McCall, 2006McCall, , 2007Dusseldorp, 2010;d'Errico et al., 2012) together with a comparatively abundant assemblage of human remains (e.g., Singer and Wymer, 1982;White, 1987;Deacon, 1991, 2001;Br€ auer et al., 1992;Smith, 1992;Frayer et al., 1993;Churchill et al., 1996;Lam et al., 1996;Br€ auer and Singer, 1996a, b;Pearson and Grine, 1997;Grine et al., 1998;Groves, 1998;Pearson et al., 1998;Groves and Thorne, 2000;Rightmire et al., 2006;Royer et al., 2009;Grine et al., 2017a). ...
Two new distal manual phalanges from the Middle Stone Age deposits of Klasies River Main Site are described. One (SAM-AP 6387) likely derives from ray II or ray III, whereas the other (SAM-AP 6388) is from the thumb. Both derive from a late adolescent or fully adult individual. They were recovered by H. Deacon from the same stratigraphic unit (submember W or possibly submember R) of the Shell and Sand Member of Cave 1, which places them between 100 and 90 ka. Both are comparatively small elements, and the possibility that they came from the same hand cannot be discounted at this time. These bones add to the meager and all too fragmentary postcranial human fossil sample from the Late Pleistocene of South Africa. These two specimens provide some additional evidence pertaining to the morphological attributes of the distal phalanges of the Middle Stone Age inhabitants of South Africa. Together with the distal pollical phalanx from Die Kelders (SAM-AP 6402), they are relatively small in comparison with homologs from recent human samples as well as Late Pleistocene specimens from Eurasia. Given their small sizes, the distal pollical phalanges from Klasies and Die Kelders are not dissimilar to Holocene Khoesan homologs. As expected, the Klasies elements differ noticeably from Neandertal homologs, especially in the narrowness of their shafts and distal tuberosities.
... Demographic factors may have had a significant impact on human behavioural development during the late Pleistocene (Clark 2011;Henshilwood and Marean 2003;Mellars 2006;Powell et al. 2009;Richerson et al. 2009;Shennan 2001;Steele and Klein 2009). Increases in population density, for example, would have affected subsistence behaviour and, possibly, technological trends (McCall 2007;Minichillo 2006). ...
... The nonpreference-based change models propose that change in archaeological raw material patterns is the result of what raw materials are available to be encountered on the landscape (Oestmo, 2017). There are two main variants of this model: (1) a natural availability variant, which proposes that the availability of materials that can be encountered can change due to environmental factors such as erosion, exposure, burial, or removal acting on sources (Brown, 2011;Volman, 1981); or (2) a mobility-linked variant that proposes that a new mobility strategy that for example increases range size, changes foraging patterns, or frequency of residential moves results in the foragers encountering new sources (Ambrose and Lorenz, 1990;McCall, 2007;McCall and Thomas, 2012). In the mobility-linked variant the raw material availability covaries with changes in human mobility strategies. ...
The Palaeo-Agulhas Plain (PAP), when exposed, presented Middle Stone Age (MSA) foragers at Pinnacle Point (PP) on the South Coast of South Africa with new sources of raw materials to make stone tools. Sea-level fluctuations and the changing size of the Paleo-Agulhas Plain throughout the Pleistocene PP record ∼165 ka to 50 ka would have altered the availability of different resources, thus potentially forcing new raw material procurement strategies. The relative frequencies of raw material throughout the PP sequence shows that frequencies of raw material types did change, especially after 90 ka. What caused these changing frequencies is debated and centers on whether targeted procurement of specific raw materials was the cause, or if simple raw material availability and abundance due to the changing environmental context in conjunction with opportunistic procurement drove such shifts. The application of a neutral model of stone raw material procurement presented here evaluates whether random walk in the region surrounding the PP site during different coastline configurations (Marine Isotope Stage 6, 5, and 4) explains the observed shifts in raw material usage. Put differently, did opportunistic acquisition of raw materials during random walk in these different environments cause the observed raw material pattern? Model simulations and a sensitivity analysis provide no convincing evidence that observed raw material frequencies at PP resulted from opportunistic acquisition during random walk.
... East African lithic assemblages often feature long-distance procurement of raw materials, blade production, bifacially retouched points, and early instances of microlithic implements (Ambrose 1998;Gliganic et al. 2012;Pleurdeau 2006;Tryon et al. 2012). The southern African record has produced a robust dataset of precocious time-constrained industries in which flake or blade blanks were retouched to create near-microlithic tool insets, again linked to specific environmental and demographic pressures (Brown et al. 2012;McCall 2007). In these examples, time and energy investments in stone tool technologies were oriented toward specific goals. ...
The African Middle Stone Age (MSA, typical range ~ 320–30 ka) has been the subject of intense research interest in recent decades as a culture-chronological Unit associated with the emergence and dispersal of our species. Recent results of this work have shown that sites designated as “MSA” contain common approaches to lithic reduction, but that within this rubric, there is much diversity in overall assemblage characteristics and the timing of their appearance across the continent. As researchers recover more data from more sites, especially from undersampled geographic regions, this more complex picture of the MSA reveals technological and other behavioral diversity in early modern human populations that may inform about the ultimate success of our species. Here we add to this growing database by describing the environmental context and characteristics of two concentrations of stone artifacts from the late MSA (~ 43–21 ka) open-air locality of Chaminade-I (CHA-I), near the town of Karonga in northern Malawi. The CHA-I lithic artifacts show a flexible approach to stone tool production and use that is common to assemblages in Karonga but distinctive from MSA sites reported elsewhere. Radial and minimally reduced cores typify an unelaborated lithic assemblage, in which raw material choice is driven by toolstone clast size and shape rather than preferential use or treatment of specific materials, as found in MSA assemblages in the East African Rift, South Africa, and the North African coast. Lithic reduction at CHA-I took place within a woody, riparian context embedded within a more open woodland landscape. Most artifacts occurred in near-channel sandy deposits dated to ~ 41 ka, and were buried under alluvial fan deposits that began aggrading by at least ~ 21 ka and continued beyond ~ 5.5 ka within a grassy, open landscape. The site’s late MSA age and lack of elaboration in lithic technology challenges straightforward ideas of increasing complexity in human technological behavior over time and provides important insight into the diversity of MSA technologies and the environmental conditions in which they existed.
... Linking specific aspects of human development such as stone tool industries or technocomplexes to environmental change is fundamentally difficult and contentious. For example, McCall (2007) argues for a direct correlation between the HP and colder temperatures during late MIS 4 (see also Ambrose and Lorenz 1990). argue that there can be no such association given that global temperatures at this time exhibit a warming trend. ...
... What is increasingly clear however, is that there is strong spatial variability in patterns of climate change across southern Africa. Rather than extrapolation to distant palaeoclimate records, theoretical models linking changes in regional resource distribution and predictability with hunter-gatherer strategies of mobility, settlement patterning, foraging range size and tool design (Ambrose and Lorenz, 1990;McCall, 2007) offer a potentially more useful perspective for understanding the regional diversity in the archaeological record as the resolution of these records improves. Adamiec and Aitken, 1998Moernaut et al., 2010 ...
Single grain OSL dating has been used to produce new chronologies for three previously investigated sites in the northern Kalahari basin in western Zambia containing both Middle and Later Stone Age material (Phillipson, 1975a, b). We find that Mode 3 (Middle Stone Age, MSA) assemblages in the Upper Zambezi Valley pre-date the Last Glacial Maximum. The chronology produced here is consistent with age estimates from a handful of dated sites within the wider Kalahari basin. The Mode 3 to Mode 5 (Later Stone Age, LSA) relationship at one site, Chavuma, is unlikely to be a continuous transition as previously thought. Instead we find a significant chronological hiatus between MSA material deposited at 66.5 ± 9.9 ka and LSA material deposited at 16.7 ± 2.6 ka. We consider these dated archaeological finds within the context of current archaeological and palaeoenvironmental records for the region. The results demonstrate the highly variable climate history of the region and the limitations of the existing archaeological record for modelling human responses to habitat change.
... Models of our species' behavioural origins often extrapolate site-based evidence to landscape scale interactions (e.g. d 'Errico et al. 2017;Mackay et al. 2014a;Marean 2010;McCall 2007;Porraz et al. 2013;Powell et al. 2009;Villa et al. 2010). Southern Africa's documented Late Pleistocene Will et al. (2015) (N.B. since this publication, the far eastern scatter of UPK 7 has been assigned the new locality name 'UPK 9') Archaeol Anthropol Sci (2019) 11:5851-5877 archaeological record mostly derives from rock shelters. ...
The original version of this article, unfortunately, contained error. Modifications have been made to the Introduction, Results/observations, Figures and figure citations. The original article has been corrected.
... Models of our species' behavioural origins often extrapolate site-based evidence to landscape scale interactions (e.g. d 'Errico et al. 2017;Mackay et al. 2014a;Marean 2010;McCall 2007;Porraz et al. 2013;Powell et al. 2009;Villa et al. 2010). Southern Africa's documented Late Pleistocene archaeological record mostly derives from rock shelters. ...
The following link to our Open Science Framework project provides open access to the Phillips et al. raw data, R code, and manuscript text (https://osf.io/cxta4/)
... Models of our species' behavioural origins often extrapolate site-based evidence to landscape scale interactions (e.g. d 'Errico et al. 2017;Mackay et al. 2014a;Marean 2010;McCall 2007;Porraz et al. 2013;Powell et al. 2009;Villa et al. 2010). Southern Africa's documented Late Pleistocene Will et al. (2015) (N.B. since this publication, the far eastern scatter of UPK 7 has been assigned the new locality name 'UPK 9') Archaeol Anthropol Sci (2019) 11:5851-5877 archaeological record mostly derives from rock shelters. ...
Open-air archaeology plays a limited role in southern African Late Pleistocene research, with most studies focused on rock shelter assemblages. Recently, archaeologists have noted discrepancies in the composition of Late Pleistocene lithic assemblages between some of the region’s open-air and rock shelter sites. For example, although relatively abundant in rock shelters, Late Pleistocene Later Stone Age (LSA, c. 44–12 kcal. BP) bipolar cores are rare in open-air contexts. In this paper, we assess this discrepancy by testing for differential preservation of specific artefact classes and sizes in semi-arid open-air conditions. We placed a replicated assemblage of miniaturised cores and flakes on an archaeologically sterile sediment surface in the Doring River Valley (South Africa) and recorded their movements over 22 months. Our results indicate that bipolar and freehand cores moved comparable distances within the study interval and that surface slope is the strongest predictor of miniaturised tool movement.We also show that (1) relatively flat lithics move disproportionately more and (2) random artefact orientations do not preclude local (i.e. metre) scale artefact transport. In terms of the archaeology of our study area, the observed clustering of surface artefacts on sediment bodies likely results from their recent exposure. Our data suggest that the paucity of open-air bipolar artefacts in Late Pleistocene LSA assemblages may have more to do with human behavioural variability at landscape scales than differential preservation. Southern Africa’s rich rock shelter record is, therefore, unlikely to represent the full suite of prehistoric hunter-gatherer behaviours.
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... Demographic factors may have had a significant impact on human behavioural development during the late Pleistocene (Clark 2011;Henshilwood and Marean 2003;Mellars 2006;Powell et al. 2009;Richerson et al. 2009;Shennan 2001;Steele and Klein 2009). Increases in population density, for example, would have affected subsistence behaviour and, possibly, technological trends (McCall 2007;Minichillo 2006). ...
Demography probably had a significant influence on the transmission of cultural innovation during the late Pleistocene. In enclosed sites such as rockshelters, trampling marks are likely direct evidence for human occupations and can possibly be used to infer occupational patterns. In this study, we explore trampling modification as a proxy for occupational intensity. We examined trampling data at the Middle Stone Age site of Blombos Cave in South Africa to investigate whether these marks may inform on occupational intensity during the Still Bay period—a significant era for the development of behavioural modernity. Trampling is defined by pitting, scratches, abrasion and linear marks. These marks were then compared to other taphonomic proxies (e.g., faunal density per volume, transverse fractures, non-anthropogenic modification) to explore the relationships between these indicators. Our results indicate that trampling modifications can provide information on a site’s occupational history and that the data indicate that there are two phases within the Blombos sequence showing more intense/frequency occupations, corresponding to the early and middle Still Bay deposits.
... Others have suggested that bladelet production provided benefits under conditions of high residential mobility (Goebel, 2002; Neeley, 2002). Both explanations e increased subsistence risk and increased mobility e have been posited for bladelet-rich systems in southern Africa during globally cooler conditions (Mitchell, 2000;Ambrose, 2002;Grosjean et al., 2003;Mellars, 2006;McCall, 2007;McCall and Thomas, 2012). The Robberg specifically has been associated with increased residential mobility in response to inferred diminishing resource density (Mitchell, 2000;Ambrose, 2002), and has been explained as a risk-dampening response to resource stress (Mackay, 2009). ...
Africa's southern Cape is a key region for the evolution of our species, with early symbolic systems, marine faunal exploitation, and episodic production of microlithic stone tools taken as evidence for the appearance of distinctively complex human behavior. However, the temporally discontinuous nature of this evidence precludes ready assumptions of intrinsic adaptive benefit, and has encouraged diverse explanations for the occurrence of these behaviors, in terms of regional demographic, social and ecological conditions. Here, we present a new high-resolution multi-proxy record of environmental change that indicates that faunal exploitation patterns and lithic technologies track climatic variation across the last 22,300 years in the southern Cape. Conditions during the Last Glacial Maximum and deglaciation were humid, and zooarchaeological data indicate high foraging returns. By contrast, the Holocene is characterized by much drier conditions and a degraded resource base. Critically, we demonstrate that systems for technological delivery e or provisioning e were responsive to changing humidity and environmental productivity. However, in contrast to prevailing models, bladelet-rich microlithic technologies were deployed under conditions of high foraging returns and abandoned in response to increased aridity and less productive subsistence environments. This suggests that posited links between microlithic technologies and subsistence risk are not universal, and the behavioral sophistication of human populations is reflected in their adaptive flexibility rather than in the use of specific technological systems.
... For a recent synthesis of different hypotheses regarding its appearance and disappearance see Dusseldorp [72]; he explains the transition as the result of changes in both resource availability and mobility strategies. Arguments that have focused on environmental explanations for the transition include, for example, Deacon [71], Ambrose and Lorenz [73] and McCall [74], among others. In other words, previous explanations for the appearance and disappearance of Howiesons Poort have concentrated on its characteristic material culture as a particular environmental adaptation in southern Africa to particularly harsh Late Pleistocene conditions. ...
We evaluate the cultural variation between the youngest Howiesons Poort layer (GR) and the oldest post-Howiesons Poort layers (RB-YA) of Sibudu Cave (KwaZulu-Natal, South Africa). We first conducted a technological analysis, secondly we performed a cladistic study with all the technological traits and, finally, we compare the technological variability with other data from Sibudu (ochre, micromorphology, fauna and plant remains). The synapomorphies of the cladistical analysis show numerous lithic technological changes between the youngest Howiesons Poort and the oldest post-Howiesons Poort layers as previously concluded. However, some technological strategies that are present, yet uncommon, in the Howiesons Poort become abundant in the overlying layers, whereas others that were fundamental to the Howiesons Poort continue, but are poorly represented in the overlying layers. We further show that lithic technological strategies appear and disappear as pulses in the post-Howiesons Poort layers studied. Among the most notable changes in the post-Howiesons Poort layers is the importance of flake production from discoidal knapping methods, the unstandardized retouched pieces and their infrequent representation, and the higher than usual frequency of grindstones. We evaluate various hypotheses to explain the transformation of a Howiesons Poort formal industry to a more ‘expedient’ assemblage. Since no marked environmental changes are contemporary with the technological transformation, a change in residential mobility patterns seems a plausible explanation. This hypothesis is supported by the changes observed in stratigraphy, lithic technology, site management, ochre and firewood collection.
The heat treatment of lithic raw materials to modify their physical properties was a major technological innovation of the Middle Stone Age (MSA) and was present by at least ~ 130 ka in southern Africa. Most research on the heat treatment of silcrete in MSA lithic technology have come from sites in western South Africa. Less data is available about the context in which silcrete was acquired and modified along the southern coast, raising questions regarding how widespread the heat treatment of silcrete was in the MSA. This paper examines how silcrete was used at Nelson Bay Cave, South Africa and the role of heat treatment in MSA technology at the site. Silcrete was a minor component of Early MSA lithic technology but makes a comparatively high contribution to the assemblage in the earliest Howiesons Poort layers at the site. Frequencies of silcrete use decrease in the later Howiesons Poort. The application heat treatment remains relatively consistent, despite variation in the contribution of silcrete to the lithic assemblage. Results from Nelson Bay Cave support data from other sites in southern Africa indicating the widespread use of heat treatment in the Early MSA with little change in frequency through the Howiesons Poort.
Southern Africa features an intensively studied Stone Age sequence, though one with geographical and temporal gaps. The archaeology of Marine Isotope Stage (MIS) 3 remains understudied, particularly between ~ 50 − 25 ka. This period encompasses numerous ecological, demographic and behavioural changes, most notably the passage from Middle Stone Age (MSA) to Later Stone Age (LSA) technologies. In western South Africa, previous research postulated a hiatus in the cultural sequence during the second half of MIS 3, potentially reflecting depopulation due to hyperarid environments. Here we document rare occupations during this period in the Western Cape at Mertenhof Rock Shelter (MRS) by providing new chronometric and technological data. OSL estimates suggest two pulses of low-density occupations at ~ 50 ka and 41 − 37 ka, allowing for a diachronic assessment of technological changes. These sporadic MSA occupations complement the more widespread occurrence of open-air settlements along the Doring River during ~ 50 − 35 ka. At MRS, knappers procured local rock types and produced small flakes and some blades via platform and bipolar reduction but without Nubian methods. The retouched pieces feature splintered pieces and denticulates but mostly lack points. Notable differences to sites in eastern southern Africa underscore ongoing technological regionalization and demographic partitioning during MIS 3. The temporal changes in the sequence show no consistent trajectory towards the ELSA in the region that appears around 25 ka. Lithic and chronometric evidence from MRS supports scenarios of a long persistence of the MSA within MIS 3 in southern Africa and a late emergence of the LSA after 35 ka.
Southern Africa is characterized by the development of varied Middle and Later Stone Age techno-complexes and behaviors against a backdrop of complex climatic conditions during the late Pleistocene and Holocene. While much work has been devoted to reconstructing regional environmental patterns, site-specific ecological and habitat contexts have primarily focused on a single site or small area. The local manifestations of regional climatic conditions are analyzed here by compiling faunal enamel stable isotope data from 13 sites across South Africa, Lesotho, and Zambia. Measuring isotope space and overlap reveals distinct on-the-ground habitat circumstances across regions and even variability within some regions, especially in the period ~ 36,000–5000 years ago. This analytical framework aims to test whether sites within the same environmental zones overlap in isotope space and finds that there is greater intra-regional environmental heterogeneity than expected. Patterns of contracting and expanding isotope space, especially along the oxygen axis, may provide insight to shifts in rainfall seasonality and, perhaps, sources of precipitation. This increased understanding of the local manifestations of regional climatic conditions through time and space will be a critical component of models of population movement and interactions in the late Pleistocene and Holocene of southern Africa.
One of the main elements in prehistoric research is the study of settlement patterns. In the last five decades, stemming partially from Binford’s research on the topic, the idea of settlement patterns is based on site typology, including the traditional residential and logistic concepts. Both models of land use and exploitation are certainly marked by the notion of short-term occupation. This concept, used freely by many archaeologists, tends to rely on two main ideas: an occupation lasted a short span of time and resulted in a limited amount of material culture. Our aim, based on our results from various archaeological case studies dated to the Upper Palaeolithic of Portugal, is to show that neither idea is necessarily correct: e.g. there may be short-term occupations with the production of large amounts of artefacts, such as lithic workshops; there might be very small collections, such as lithic caches, resulting from short occupations but with very long uses of the site; and most times, both are hardly differentiated within complex palimpsests. Our study shows that the common use of lithic volumetric density and retouch frequency is not always sufficient to differentiate between short- and long-term occupations. Also, there are other variables that are more sensitive to indicate the duration of occupation of an archaeological context that should be used in the identification of time length.
This paper examines the stone tool technology from the site of Kenure, Co. Dublin, on the East coast of Ireland. Collected in the 1940s by the avocational archaeologist Gwendoline C. Stacpoole, Kenure represents an extremely large surface assemblage likely belonging to the later phase of the Irish Late Mesolithic period (~7000–5500 BP). The results of this analysis affirm the likelihood that the Kenure lithic assemblage does, in fact, date to the Late Mesolithic. Core reduction was conducted using hard hammers and was generally expedient, usually involving the splitting of locally occurring glacial till chert cobbles followed by the use of single platform core reduction strategies. Retouched tools were characterized by a range of scraper, notch, denticulate, and borer forms. Moderate frequencies of convergent flakes were also present, with many fitting the typological definition of Bann flakes. In addition, there were noticeable numbers of small blades, though these generally lack the specialized technical features of Mesolithic blades from the Irish Early Mesolithic and Mesolithic sites in other regions of Western Europe. Moderate frequencies of pieces derived from bipolar percussion were also present in the Kenure assemblage and this paper offers an explanation of the use of bipolar percussion in relation to the small size of locally available lithic raw materials. Finally, this paper concludes with a consideration of the implications of the technological features of the Kenure assemblage for the organization of Irish Late Mesolithic foraging technology, as well as the potential for future research on the Kenure collection.
The triad of landscape-climate-human relationships provides a secure context or interpretive framework for understanding not only the macroscale landscape development of southern Africa during the Quaternary, as reflected in the geomorphological and sedimentary record, but also those patterns and processes of human physical evolution and behaviour that took place within that landscape, as reflected in the fossil, archaeological and palaeoanthropological records. In this chapter, we reflect upon the complexity of such relationships, and the limitations on our current understanding, which is based on studies that are inevitably grounded in a narrow spatial and temporal context. To remedy this situation, we propose a more explicitly integrated landscape-climate-human approach to Quaternary studies in southern Africa, which may yield a better understanding of the sensitivity of landscapes and human activity to future climate and environmental changes in the Anthropocene. This in turn should lead us to a more realistic reconstruction of the many-faceted variables of our southern African collective past.
The nature of hunter-gatherer mobility strategies--the way in which hunter-gatherers move about a landscape over the course of a year--is discussed, using ethnographic data. Several mobility variables that measure residential and logistical mobility are defined; several environmental variables which measure resource accessibility and resource monitoring costs are also defined. Ethnographic data are used to demonstrate patterning between the nature of mobility strategies and the resource structure of an environment. The data show that the extent to which a group of hunter-gatherers emphasizes residential or logistical mobility is closely related to the structure of resources in their environment.
Discusses apparent flexibility of organization as a means of reducing risk and the effects that such a social system has on many areas of Bushman life, and illustrates these points by describing the Kung system of reciprocity called hxaro. -M.Barrett
This contribution aims to provide a concise review of Howiesons Poort research conducted over the past eight decades since the industry was first identified. A review is considered useful in the light of current interest in the industry and what it means in terms of technological and cognitive evolution. It is also true that far-reaching behavioural hypotheses have been built around the Howiesons Poort, some with very little supporting evidence. Recent developments in stone tool analysis, environmental reconstruction and dating methodology are providing us with new tools to measure the time depth and limits of the Howiesons Poort. Such methods may also provide detailed empirical data to build onto or re-assess hypotheses regarding human behaviour associated with this stone tool industry.
Archaeology's main contribution to the debate over the origins of modern humans has been investigating where and when modern human behavior is first recognized in the archaeological record. Most of this debate has been over the empirical record for the appearance and distribution of a set of traits that have come to be accepted as indicators of behavioral modernity. This debate has resulted in a series of competing models that we explicate here, and the traits are typically used as the test implications for these models. However, adequate tests of hypotheses and models rest on robust test implications, and we argue here that the current set of test implications suffers from three main problems: (1) Many are empirically derived from and context-specific to the richer European record, rendering them problematic for use in the primarily tropical and subtropical African continent. (2) They are ambiguous because other processes can be invoked, often with greater parsimony, to explain their character. (3) Many lack theoretical justification. In addition, there are severe taphonomic problems in the application of these test implications across differing spans of time. To provide adequate tests of these models, archaeologists must first subject these test implications to rigorous discussion, which is initiated here.
A chaîne opératoire approach to the analysis of the Howiesons Poort backed artefacts from Klasies River main site was used to describe raw material acquisition, blank production and selection, modification through retouch and use. The results show that the process of making backed artefacts reflects the imposition of attributes of style. Style is equated with communication through the medium of symbols. The ability to manipulate symbols is termed symbolic behaviour and is characteristic of the sapient mind. It implies the use of language. On this evidence, the emergence of symbolic behaviour long preceded the Upper Palaeolithic.
L'article rapporte la decouverte, dans les niveaux du Middle Stone Age de la grotte de Blombos (Cape Town, Afrique du Sud), d'un mobilier lithique presentant des caracteristiques techniques et typologiques assez inhabituelles et surtout, d'une industrie osseuse. L'analyse de la composition en carbone et en nitrogene de cette industrie et d'ossements non travailles corroborent leur attribution au MSA. Deux des pointes constituant ce mobilier peuvent donc etre considerees comme les deux premiers objets osseux standardises dont on a demontre par une analyse directe, l'attribution a un assemblage de plus de 40.000 ans. De plus, cette decouverte met en avant la necessite d'une reconsideration chronologique de l'utilisation d'ossements travailles comme outils
Hunter-gatherer adaptations to long-term fluctuations in regional resource structure require mechanisms to cope with periodic subsistence stresses. Among documented groups, a common response to such stress is temporary movement into adjacent occupied areas-moving in with "relatives" when things go wrong. However, in the case of early (ca. 12,000-10,000 B.P.) Paleoindian groups in the Americas, the availability of neighboring groups with a detailed knowledge of local resource geography could not be relied upon. Post-Pleistocene environmental changes and the low initial population of the New World are important factors conditioning a lifeway characterized by a dependence on hunting (though not exclusively of megafauna), and by high residential, logistical, and range (territorial) mobility. Early Paleoindian groups had to adopt a subsistence technology that could be employed regardless of the specific resource microstructure. In some regards, Paleoindians seem to have behaved like tropical foragers while in others like arctic collectors. Use of high quality lithic raw materials from large quarry sources, reliance on a bifacial technology, limited use of caves and rockshelters, and a low level of processing of food products for storage all may be indicative of such a subsistence technology, which would have been unlike that of any modern hunter-gatherers.
The question of human territoriality has frequently been debated, but most previous discussions have not sufficiently emphasized ecological variables as major factors determining territoriality. We argue that current theories in sociobiology, especially the model focusing on economic defendability of resources, need to be considered in analyzing human territoriality. According to this model, territoriality is expected to occur when critical resources are sufficiently abundant and predictable in space and time, so that costs of exclusive use and defense of an area are outweighed by the benefits gained from resource control. This model is developed, and then applied to several locally adapted human populations (Northern Ojibwa, Basin-Plateau Indians, and Karimojong). Variations in territorial responses for these groups seem to accord with the predictions of the economic defendability model. [territoriality, resource defense, human ecology, sociobiology, spatial organization]
The Later- and Middle Stone Age levels at Blombos Cave (BBC) were excavated over four field seasons between 1992 and 1999. Here we report on the results from the Middle Stone Age (MSA) levels. The taphonomy and depositional history of the MSA levels is complex due to faulting, folding and spalling. Careful observations during excavation have assisted in understanding some of these taphonomic and site formation processes; microstratigraphic analysis, currently in progress, will add to this information. The uppermost MSA level, the Still Bay phase, contains high densities of bifacial points, the fossile directeur of the Still Bay Industry. Placing the Still Bay within the MSA culture sequence has been problematic in the past because Still Bay assemblages are rarely found in situ and previous excavations were inadequately recorded. However with the regional data discussed in the text, the Still Bay can be securely placed before the Howiesons Poort dated at 65-70 ka.
Stratified samples of artefacts from the Late Pleistocene deposit at the Klasies River main site, covering some 60,000 years, have been studied. Variability in the artefact sequence has been documented in the technologies of artefact production in addition to conventional typological analysis. Particular emphasis has been given to the recognition of the reduction sequences used in producing the pre-formed blanks that are a feature of the Middle Stone Age. The results show that the variability is due to changes between the dominant blade and or point technological conventions (traditions) through time. Technological study supports and gives meaning to the recognition of distinct sub-stages, MSA I (Klasies River), MSA II (Mossel Bay), Howiesons Poort and a post-Howiesons Poort at main site. These sub-stages are more than convenient, site-specific, organizational entities—they delineate separate technological conventions that may have relevance on a sub-continental scale.
Thesis (Masters)--University of Stellenbosch, 1997. Includes bibliographical references (leaves 110-131).
Twenty-eight bone tools were recovered in situ from ca. 70 ka year old Middle Stone Age levels at Blombos Cave between 1992 and 2000. These tools are securely provenienced and are the largest collection to come from a single African Middle Stone Age site. Detailed analyses show that tool production methods follow a sequence of deliberate technical choices starting with blank production, the use of various shaping methods and the final finishing of the artefact to produce "awls" and "projectile points". Tool production processes in the Middle Stone Age at Blombos Cave conform to generally accepted descriptions of "formal" techniques of bone tool manufacture. Comparisons with similar bone tools from the Later Stone Age at Blombos Cave, other Cape sites and ethnographic collections show that although shaping methods are different, the planning and execution of bone tool manufacture in the Middle Stone Age is consistent with that in the late Holocene. The bone tool collection from Blombos Cave is remarkable because bone tools are rarely found in African Middle or Later Stone Age sites before ca. 25 ka. Scarcity of early bone tools is cited as one strand of evidence supporting models for nonmodern behaviour linked to a lack of modern technological or cognitive capacity before ca. 50 ka. Bone artefacts are a regular feature in European sites after ca. 40 ka, are closely associated with the arrival of anatomically modern humans and are a key behavioural marker of the Upper Palaeolithic "symbolic explosion" linked to the evolution of modern behaviour. Taken together with recent finds from Klasies River, Katanda and other African Middle Stone Age sites the Blombos Cave evidence for formal bone working, deliberate engraving on ochre, production of finely made bifacial points and sophisticated subsistence strategies is turning the tide in favour of models positing behavioural modernity in Africa at a time far earlier than previously accepted.
In the Eurasian Upper Paleolithic after about 35,000 years ago, abstract or depictional images provide evidence for cognitive abilities considered integral to modern human behavior. Here we report on two abstract representations engraved on pieces of red ochre recovered from the Middle Stone Age layers at Blombos Cave in South Africa. A mean date of 77,000 years was obtained for the layers containing the engraved ochres by thermoluminescence dating of burnt lithics, and the stratigraphic integrity was confirmed by an optically stimulated luminescence age of 70,000 years on an overlying dune. These engravings support the emergence of modern human behavior in Africa at least 35,000 years before the start of the Upper Paleolithic.
There are two competing models for the emergence of modern human behavior: first, a late emergence in Africa or Eurasia at ∼50 to 40 thousand years ago (ka), and second, a gradual transition in Africa between 250 to 50 ka ([ 1 ][1]). In both models, personal ornaments and art are unquestioned
Stone tools and the debris from their manufacture are the most common remains from archaeological sites all over the world. Unraveling how prehistoric people made and used their technology is a major challenge of archaeological interpretation. Many archaeologists have sought to understand the organization of technology through an emphasis on the internal production mechanics of stone tools. This approach has been used to study behavioral tactics through examination of the inferred design of lithic reduction strategies. Such studies implicate aspects of behavior that can be monitored through differential raw material use (Ahler 1977; Bamforth 1986; Goodyear 1979; Jeske 1989; Kuhn 1991; Wiant and Hassen 1985; Winters 1984), production trajectories (Bradley 1975; Collins 1975; Dibble 1988; Muto 1971), tool design, and use life (Bleed 1986; Gurfinkel and Franklin 1988; Hayden 1989; Keeley 1980; Kelly 1988; Kuhn 1994; Shott 1986, 1989a, 1989b; Vaughan 1985).
I report the results of a microscopic study of the bone modification in the identified bovid assemblage from Cave 1 at Klasies River Mouth (KRM), in South Africa. The study was undertaken in an effort to resolve divergent interpretations of the predatory competence of the early modern humans there. The microscopic data suggest that the hominids had relatively unrestricted access to the choicest parts of bovids in all size classes. The carnivore damage signature is ephemeral; it does not support assertions that large carcasses were carnivore-ravaged before their appropriation by hominids or that carnivores contributed a meaningful number of smaller bovids to the faunal assemblage. The data therefore lead to the conclusion that hominids were the sole, regular accumulators of bovids in all size classes. That many of those bovids were obtained by active hunting is suggested by the tip of a stone point embedded in a cervical vertebra of the extinct giant buffalo,Pelorovis antiquus. Finally, some attributes of the butchering patterning hint that the Klasies hominids formed socially mediated task groups to accomplish labour-intensive tasks. These results challenge the general perception that modern morphology pre-dated modern behaviour and the specific assertion that the KRM hominids were behaviourally very primitive. The KRM hominids were apparently active hunters who produced composite tools and who planned and executed complex tasks within a social framework. To the extent that these behaviours presage the modern condition, the KRM hominids were as behaviourally near-modern as they were anatomically near-modern.
Human beings depend more on technology than any other animal-the use of tools and weapons is vital to the survival of our species. What processes of biocultural evolution led to this unique dependence? Steven Kuhn turns to the Middle Paleolithic (Mousterian) and to artifacts associated with Neandertals, the most recent human predecessors. His study examines the ecological, economic, and strategic factors that shaped the behaviour of Mousterian tool makers, revealing how these hominids brought technological knowledge to bear on the basic problems of survival. Kuhn's main database consists of assemblages of stone artifacts from four caves and a series of open-air localities situated on the western coast of the Italian peninsula. Variations in the ways stone tools were produced, maintained, and discarded demonstrate how Mousterian hominids coped with the problems of keeping mobile groups supplied with the artifacts and raw materials they used on a daily basis. Changes through time in lithic technology were closely tied to shifting strategies for hunting and collecting food. Some of the most provocative findings of this study stem from observations about the behavioural flexibility of Mousterian populations and the role of planning in foraging and technology.
Design engineers share archaeologists' interest in material culture, but unlike archaeologists, engineers have developed concepts for determining the suitability of technical systems to perform specific tasks. Given the difficulty archaeologists face in developing theories of material culture, I suggest that guiding principles of engineering design offer potentially useful insights.
In this article I discuss two design alternatives for optimizing the availability of any technical system - reliability and maintainability. Reliable systems are made so that they can be counted on to work when needed. Maintainable ones can easily be made to function if they are broken or not appropriate to the task at hand. Because these design alternatives have markedly different optimal applications and observably different physical characteristics, archaeologists can link the design of prehistoric weapons to environmental constraints and to specific hunting strategies. Ethnographic examples indicate that primitive hunters do use both reliable and maintainable systems in optimal situations.
Backed microliths made on small flakes and blades are considered the hallmark of Later Stone Age (LSA) industries of sub-Saharan Africa. However, some early LSA microlithic industries lack backed tools, others have extremely large ones, and some Middle Stone Age (MSA) industries also have high frequencies of blades and large backed “microliths.” The invention of blades, backed microliths, and microlithization were thus separate phenomena in sub-Saharan Africa. Given this diversity and complexity, a “one size fits all” model may neither satisfactorily characterize nor explain the origin of blade-based technologies, large backed tools in the MSA, and microlithic industries in the LSA. This chapter will briefly summarize the evidence for early backed tool and microlithic industries and then evaluate several hypotheses for microlithization and backed tool production, including the invention of composite hafted tools, punch blade technology, hunting with bow and arrow in closed habitats, invention of poisons for projectiles, increased access to fine-grained raw materials, increased mobility, conservation of scarce materials, giving gifts of backed microliths made on fine-grained exotic raw materials, and manufacture of more effective specialized toolkits when increased information sharing permitted reliable anticipation of tasks. If microlithic and backed blade–based industries were invented in Africa, then understanding their origin may provide insight into the evolution of modern human behavior and the dispersal of modern humans and modern human technology out of Africa.
Current interest in the origins of anatomically modernHomo sapiens has focused attention on early modern human remains and related archaeological materials associated with the southern African Middle Stone Age. While the anatomically modern status and a Last Interglacial or later age for the human fossils enjoy general support, issues related to the definition of the Middle Stone Age, its dating, and the interpretation of human behavior lack consensus. Available evidence suggests that the anatomically modern human skeleton appeared well before many aspects of the subsistence and symbolic behavior that characterize recent foragers and that Middle Stone Age technology persisted longer in southern Africa than its northern hemisphere counterpart.
Relative changes in temperature are inferred from multivariate analysis of the relative abundance of rodents and insectivores represented in Late Quaternary deposits at nine sites in various regions of southern Africa. The major increase in temperature at the end of the Last Glacial Maximum is documented, and relative changes in temperature are calibrated for all sequences. The method of analysis provides an opportunity to correlate sequences from cave deposits which are beyond the range of conventional radio-carbon dating techniques.
Luminescence dating results are reported for two South African archaeological sites where changes in the dose rate through time are apparent. A subtraction procedure involving analysis of both quartz and potassium-feldspar extracts is applied to detect and correct for these changes. At the Middle Stone Age site of Klasies River, the dose rate changes inferred from geologic evidence for shell dissolution turn out not to be significant, having occurred rapidly after deposition. The dates here range from 50–115 ka, in broad agreement with other evidence. The important Howiesons Poort component here appears to date somewhat later (about 55–60 ka) than at several other sites in South Africa. At the Acheulian site of Duinefontein, the dose rate changes, also thought to be caused by shell dissolution, are, on the other hand, very significant. The subtraction ages here (125–300 ka) agree with independent chronological assessments.
The difference between the culture-stratigraphic entities, the MSA I and MSA II, in the Klasies River sequence is explored by statistical analysis of the end products. Technological analysis of the cores, end products and waste products suggested that the MSA I and MSA II represent distinct technological traditions aimed at producing different end products. To quantify the difference between the end products, points and blades, extensive univariate and multivariate statistical analyses of continuous variables have been undertaken. Biplot methodology is adopted for enhancing the statistical analysis. Canonical variate analysis biplots are constructed and alpha-bags added for visual displays of the overlap and separation among the different groups. It is demonstrated that the platform thickness relative to length is useful in discriminating between the end products of the MSA I and MSA II. Statistical analyses support a clear distinction between the MSA I and MSA II.
It has been suggested that many behavioral innovations, said to appear during the late Middle Stone Age in sub-Saharan Africa, facilitated the expansion of anatomically modern humans from Africa and the Near East into Europe at about 50 kyr; the process eventually led to the replacement of Neanderthals by modern humans and the emergence of the Upper Paleolithic. However, assemblages in this time range are little known in South Africa. In fact, the transition from Middle to the Later Stone Age in Southern Africa is controversial. The early appearance in South Africa of many innovations, such as sophisticated knapping techniques (e.g. the use of soft hammer or indirect percussion in blade production, of composite tools, of microlithic and bladelet technologies) remains to be established through technological analysis.
A sequence of samples of micromammalian remains from Klasies River Mouth on the south coast of South Africa provides evidence of vegetational and climatic change during the Late Pleistocene. The evidence suggests the presence of a vegetational mosaic similar to that of the present but with relatively more open vegetation at the time the central part of the sequence was being deposited than was the case at the beginning or the end. Fluctuations occurred in general climatic conditions, as indicated by the Shannon—Wiener index of diversity, but conditions appear to have remained relatively moderate throughout with no evidence of glacial or interglacial maxima. Changes in sea level are probably also reflected in changed proportions of various species of small mammal. The site has yet to be dated conclusively but the micro-mammalian data tend to support other lines of evidence which suggest that this sequence of deposits was laid down during isotope stage 5, probably substages 5d—a. Human response to the challenge of changing conditions can be shown to lag behind those changes as recorded by micromammals.
Hunter-gatherer subsistence-settlement strategies are discussed in terms of differing organizational components, "mapping-on" and "logistics," and the consequences of each for archaeological intersite variability are discussed. It is further suggested that the differing strategies are responsive to different security problems presented by the environments in which hunter-gatherers live. Therefore, given the beginnings of a theory of adaptation, it is possible to anticipate both differences in settlement-subsistence strategies and patterning in the archaeological record through a more detailed knowledge of the distribution of environmental variables.
This paper argues that southern Africa was a remote part of the Old World in the late Pleistocene (125-10 ka ago). Because of this isolated position there was continuity without significant replacement in the resident population. Isolation and the relatively recent spread of agriculture to the region has allowed a section of this population to survive into the present. They are the Bushmen (San). Studies of geographic patterning in conventional genetic markers and mitochondrial DNA indicate that the Bushman clade has a long evolutionary history in southern Africa. Estimates of more than 100 ka for the continued presence of this population in the region are supported in archaeological investigations of sites with long sequences such as Klasies River main site and Border Cave. Human remains dating to the earlier part of the late Pleistocene have been recovered from these sites and the samples form a morphological series with the Klasies River remains possibly 20 ka older than those from Border Cave. There is no fossil record for the later Pleistocene, however, at a period when selection for a gracile morphology may have been pronounced. The cultural associations in the earlier late Pleistocene are with the Middle Stone Age. Expressions of cultural 'style' and the occurrence of similar artefact design types in the Middle and Later Stone Ages can be interpreted with reference to the ethnographic present. Temporal continuity can be shown in the geographical distribution of stylistic markers and this suggests participation in a shared cognitive system.(ABSTRACT TRUNCATED AT 250 WORDS)
Proponents of the model known as the "human revolution" claim that modern human behaviors arose suddenly, and nearly simultaneously, throughout the Old World ca. 40-50 ka. This fundamental behavioral shift is purported to signal a cognitive advance, a possible reorganization of the brain, and the origin of language. Because the earliest modern human fossils, Homo sapiens sensu stricto, are found in Africa and the adjacent region of the Levant at >100 ka, the "human revolution" model creates a time lag between the appearance of anatomical modernity and perceived behavioral modernity, and creates the impression that the earliest modern Africans were behaviorally primitive. This view of events stems from a profound Eurocentric bias and a failure to appreciate the depth and breadth of the African archaeological record. In fact, many of the components of the "human revolution" claimed to appear at 40-50 ka are found in the African Middle Stone Age tens of thousands of years earlier. These features include blade and microlithic technology, bone tools, increased geographic range, specialized hunting, the use of aquatic resources, long distance trade, systematic processing and use of pigment, and art and decoration. These items do not occur suddenly together as predicted by the "human revolution" model, but at sites that are widely separated in space and time. This suggests a gradual assembling of the package of modern human behaviors in Africa, and its later export to other regions of the Old World. The African Middle and early Late Pleistocene hominid fossil record is fairly continuous and in it can be recognized a number of probably distinct species that provide plausible ancestors for H. sapiens. The appearance of Middle Stone Age technology and the first signs of modern behavior coincide with the appearance of fossils that have been attributed to H. helmei, suggesting the behavior of H. helmei is distinct from that of earlier hominid species and quite similar to that of modern people. If on anatomical and behavioral grounds H. helmei is sunk into H. sapiens, the origin of our species is linked with the appearance of Middle Stone Age technology at 250-300 ka.