Martin Kehl

Martin Kehl
University of Cologne | UOC · Institute of Geography

PhD

About

153
Publications
42,500
Reads
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2,314
Citations
Citations since 2016
83 Research Items
1765 Citations
20162017201820192020202120220100200300
20162017201820192020202120220100200300
20162017201820192020202120220100200300
20162017201820192020202120220100200300
Additional affiliations
July 2009 - present
University of Cologne
Position
  • Senior Researcher
April 2008 - March 2009
Justus-Liebig-Universität Gießen
Position
  • Professor
November 2002 - February 2008
University of Bonn
Position
  • Senior Researcher

Publications

Publications (153)
Article
With the onset of the Last Glacial Maximum (LGM), hunter-gatherers of the so-called Iberomaurusian techno-complex appeared in what is now the Mediterranean Maghreb. During a period of about seven thousand years, these groups left sandy occupation layers in a limited number of archaeological sites, while at the beginning of Greenland Interstadial (G...
Article
Full-text available
Abstract Loess-paleosol sequences are terrestrial archives of past climate change. They may host traces of ancient microbial life, but little information is available on the recovery of microbial biomarkers from such deposits. We hypothesized that microbial communities in soil horizons up to an age of 127 kyr carry information related to past envir...
Article
The southern Caspian Lowland sensitively reacted to Pleistocene climate change and is a key area for reconstructing climate dynamics and landscape evolution in Southern Eurasia. Loess-paleosol sequences (LPS) of the northern foothills of Alborz Mountains provide detailed records of climate-induced changes of dust accumulation and soil formation cor...
Article
Full-text available
The Cueva de Ardales is a hugely important Palaeolithic site in the south of the Iberian Peninsula owing to its rich inventory of rock art. From 2011–2018, excavations were carried out in the cave for the first time ever by a Spanish-German research team. The excavation focused on the entrance area of the cave, where the largest assemblage of non-f...
Article
Full-text available
The Sodicho Rockshelter in the southwestern Ethiopian Highlands presents a unique site that contains sediments of Upper Pleistocene and Holocene occupation phases of hunter-gatherer communities. Excavations and previous geoarchaeological research provided a first 14 C chronostratigraphic framework for the last 27 ka cal BP, which supports the hypot...
Conference Paper
Full-text available
Loess deposits of northern and northeastern Iran provide excellent sedimentary archives for understanding past climate and environment changes in the continental interior. The loess records paleoenvironmental change in Iran over multiple glacial cycles, and helps to assess the extent to which key features of loess stratigraphy can be traced along t...
Article
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As the south-westernmost region of Europe, the Iberian Peninsula stands as a key area for understanding the process of modern human dispersal into Eurasia. However, the precise timing, ecological setting and cultural context of this process remains controversial concerning its spatiotemporal distribution within the different regions of the peninsul...
Article
Full-text available
The Laacher See Volcano (LSV) is located at the western margin of the Neuwied Basin, the central part of the Middle Rhine Basin of Germany. Its paroxysmal Plinian eruption c. 13 ka ago (Laacher See event; LSE) deposited a complex tephra sequence in the Neuwied Basin, whilst the distal ashes became one of the most important chronostratigraphic marke...
Article
The site of Ifri El Baroud has one of the longest sequences excavated in recent times in NE Morocco, covering a chronology of ca. 23-13 ka cal BP. The sequence includes Early and Late Iberomaurusian levels and offers the possibility of investigating the economic, social and environmental processes that took place during this period. In this paper w...
Data
Two loess-paleosol sequences from the Heilbronn Basin in southwestern Germany, Frankenbach and Talheim, have been investigated to gain information about environmental conditions during the last interglacial-glacial cycle. Since paleoenvironmental research on terrestrial archives is crucial for understanding past climatic and environmental condition...
Data
The database contains 361 sites with a chronology from 57,000-12,000 yrs cal BP. They represent at least 588 occupation events.
Article
Full-text available
Un equipo interdisciplinar internacional viene realizando nuevas investigaciones en Cueva de Ardales (Ardales, Málaga) y en Sima de las Palomas (Teba, Málaga), enmarcadas en un Proyecto General de Investigación autorizado por la Junta de Andalucía. Presentamos un avance de los datos obtenidos en ambas cavidades en relación a la ocupación vinculada...
Article
In the Golestan province in northern Iran extensive loess deposits, and widespread loess-derived soils crop out. While a strong precipitation gradient (200–700 mm per year) from North to South is characteristic, temperature differences are negligible (17–18 °C per year). Recently, many studies on loess-derived palaeosols and modern soils from this...
Article
Located at the center of the Cantabrian coast in a sedimentary terrace currently at the sea shore, the site of Bañugues (Gozón, Asturias) is one of the key places for studying the first settlements of the Iberian North. In the present work, we show the results of the geoarchaeological study undertaken on the bay of Bañugues and on the stratigraphic...
Conference Paper
Full-text available
Loess palaeosol sequences (LPSs), widely spread over the northern hemisphere and especially Eurasia, are valuable records for various palaeoenvironmental parameters. Here, a LPS from northern Iran (Agh Band) was analysed in terms of rock-and palaeomagnetic proxies. The study site is located in the so-called Iranian loess plateau with an average ann...
Article
Full-text available
The work undertaken at the Jarama VI site (Valdesotos, Guadalajara, Spain) in the 1990s resulted in the recovery of thousands of archeological remains from the three Pleistocene sedimentary units of this cavity. Prior to the systematic analysis of the lithic material and the reception of new geochronological data, it had been suggested that the upp...
Article
Stable carbon and oxygen isotope compositions in soil carbonates and in soil organic matter provide insights into (paleo) climatic conditions, especially in arid and semiarid regions where carbonate is abundant in soils. We here investigate δ13C and δ18O isotope composition of bulk carbonate, pedogenic carbonate nodules and organic carbon from mode...
Article
Full-text available
This paper investigates the correlation between climate, environment and human land use in the Westernmost Mediterranean on both sides of the Strait of Gibraltar during the Late Glacial. Using a multi-proxy approach on a sample of 300 sites from the Solutrean and Magdalenian of the Iberian Peninsula and from the Iberomaurusian in Morocco, we find e...
Chapter
Full-text available
Classic models on population dynamics in inland Iberia during Marine Isotope Stage 2 have depicted this area, dominated by the Spanish plateau, as nearly unpopulated until Magdalenian times. In recent years, some researchers have questioned these models, mainly based on new field data. Preliminary evidence coming from the Peña Capón rock shelter ha...
Chapter
An international team began initial excavations in Ardales Cave (Ardales, Málaga) and in Sima de las Palomas (Teba, Málaga) within the framework of a General Research Project authorized by the Junta of Andalusia. Ardales Cave is a site well known for the importance of its Palaeolithic rock art. In this new project, excavations were carried out in z...
Article
Little attention has been given to the nature and sources of airborne dust affecting northeastern Iran. The objectives of this study were to examine the concentrations of selected potentially toxic elements (i.e., Cr, Cu, Fe, Mn, Ni, Pb, and Zn), distinguish geogenic from anthropogenic sources, and assess the pollution intensity. A total of 600 sam...
Article
Full-text available
The clay mineralogy and geochemistry of loess is sensitive to variations in sediment source area, transport processes and weathering regime over time, and thus careful study of them can provide some insight into past climate variability. The well-known loess–paleosol sequences (Upper Pleistocene Loess (UPL)) on the Iranian Loess plateau (ILP) are g...
Article
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In order to investigate the development of forest soils formed on loess, six representative modern soil pedons were selected along a precipitation gradient extending from eastern Golestan (mean annual precipitation, MAP = 500 mm) to eastern Mazandaran Provinces (MAP = 800 mm). Physiochemical, micromorphological and magnetic properties, as well as c...
Conference Paper
Full-text available
Ethiopia, a key area for hominin evolution and migration in Africa, experienced intensive tectonic, volcanic and climatic induced impacts through time. Prehistoric hunter-gatherer might have struggled but also coped with these environmental changes. One solution might have been the rescue into high-altitude areas during hyper arid phases, in accord...
Chapter
Die Funde der Speläologen des Arbeitskreises Kluterthöhle e.V. von 2004 und die Grabungen der Jahre 2006–2017 haben in der Blätterhöhle frühmesolithische und jung- bis spätneolithische Menschenrestezutage gefördert. Durch die archäologischen Ausgrabungen seit 2006 konnte auch auf dem Vorplatz der Höhle eine überregional bedeutende Abfolge mesolithi...
Thesis
Full-text available
Human disturbance of land often results in serious soil erosion and releases fine sediments and soil bound toxic metals, which can lead to contamination of downstream water bodies and cause water treatment plant failure. Yet, effective technologies for rapid in situ soil stabilization have been lacking. Nanotechnology is increasingly being used to...
Article
The so-called Iranian loess plateau is a unique landscape with a complex topography and steppe vegetation developed under semi-arid climate. We studied the relationships between geomorphic features, soils, biomass of above-ground vegetation (biomass) and soil organic carbon storage (SOCS) to further enhance our understanding of geomorphological pro...
Article
The recent discovery of Late Acheulean sites from Mount Dendi/Ethiopia (3270 m a.s.l.) questions the general assumption that high altitude mountain habitats (> 2500 m a.s.l.) are unfavorable for human occupation and that a late colonization of such areas has to be assumed. A total of 52 archaeological sites from all Stone Age periods were found on...
Article
Full-text available
Introduction: The loess-paleosol sequences in Northern Iran are important archives that represent several cycles of Quaternary climate change and can be used to complete the information gap on loess between Europe and central Asia. Last interglacial soils derived from loess in northern Iran is represented by strongly developed Bt horizons of forest...
Article
Full-text available
The spatial distribution and dating of archaeological sites suggest a poor occupation of southern Iberia by hunter-gatherers after the Last Glacial Maximum (LGM) and during Heinrich event 1 (H1) compared to Northern Iberia. The H1 was a period of cold and arid climate conditions and is suspected to have played an important role in the population dy...
Article
The existence of an early Upper Palaeolithic culture at the transition from the Middle Palaeolithic to the Upper Palaeolithic in North African cave sites is currently under debate. We studied Ifri n‘Ammar in North-East Morocco, which is one of the oldest settlement sites of anatomically modern humans (AMH) in the Maghreb and contains several sedime...
Conference Paper
Full-text available
Abstract In order to investigate the degree of development of modern forest soils formed on loess, six representative soil pedons were selected along a precipitation gradient in Golestan and Mazandaran provinces. Physiochemical and micromorphological properties of soils were studied. Soils are mainly classified as Alfisols and Mollisols. The resu...
Article
The timing of the late Middle Paleolithic and late disappearance of Neanderthals in the Iberian Peninsula are hotly debated subjects in Paleolithic archeology. Several studies suggested a late survival in South and Central Iberia until about 32 ka, but were probably subject to significant age underestimation due to contamination of dating samples,...
Article
Dust deposition rates depend mainly on the rate of dust supply, climatic conditions, and topography in the source and sink areas. The objective of this study was to investigate the role of these variables in the spatial and temporal variation of airborne dust fallout in Khorasan Razavi Province, Northeast Iran. Airborne dust samples were collected...
Chapter
Paleosols in Iran have received less attention than modern soils, although Quaternary deposits and exposures therein are widespread. The chapter gives a short introduction into the general nature of buried and relict paleosols and on methodological aspects how to recognize, characterize and date paleosols. Examples are given for Pre-quaternary and...
Article
Full-text available
The archaeological sequence of the Palaeolithic site of La Güelga apparently shows an interstratification of Aurignacian between the Mousterian and Châtelperronian layers, a sequence which disagrees with the stratigraphic model for the Middle to Upper Palaeolithic transition in SW-Europe. We analyzed the witness section of the interior sector in ar...
Article
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The area in the Central Eastern Desert at the limestone hogback of Gebel Duwi near Wadi Sodmein is currently under investigation in the Collaborative Research Centre 806 “Our Way to Europe”, (University of Cologne) in collaboration with the Egyptian Mineral Resources Authority (EMRA). In a joint fieldtrip in 2017 from CRC 806 and EMRA at Wadi Sodme...
Article
In southern Eurasia recurrent phases of aridization, dust source extension and enhanced Aeolian sedimentation alternated with moister intervals, promoting reduced deflation areas and dust accumulation in the context of late Pleistocene climate changes. Weathering and soil forming intensity in this greater region are, hence, mainly governed by fluct...
Article
Full-text available
An accurate geomorphometric description of the Iranian loess plateau landscape will further enhance our understanding of recent and past geomorphological processes in this strongly dissected landscape. Therefore, four different input datasets for four landform classification methods were used in order to derive the most accurate results in comparis...
Article
Two loess-paleosol sequences from the Heilbronn Basin in southwestern Germany, Frankenbach and Talheim, have been investigated to gain information about environmental conditions during the last interglacial-glacial cycle. Since paleoenvironmental research on terrestrial archives is crucial for a better understanding of past climatic and environment...
Conference Paper
Introduction: Topography exerts a first-order control over insolation, water and nutrient fluxes, and vegetation patterns, causing differences between south and north facing slopes (Yetemen et al. 2015). Understanding of the relationships between aspect of slope, soil, biomass and soil organic carbon (SOC) storage is important for the evaluation of...
Conference Paper
Full-text available
Investigations of loess-paleosol sequences from Northern Iran are important because this region is a key area between the European and Asian loess zones. Diffuse reflectance spectrophotometry (DRS) provides a (semi) quantitative method to determine mass concentrations of hematite (Hm) as low as ~0.01wt% in loess-paleosol sequences and also has...
Data
Paleoclimatic investigations on loess-paleosol sequences from northern Iran are important due to the specific location of this region, which may help to trace key features of loess stratigraphy along the Southern Eurasian loess belt. The oxygen and carbon isotopic composition of soil and other near surface carbonates is widely used in the geolo...
Conference Paper
Full-text available
Biological soil crusts are widely distributed in loess and sand dune surfaces of the arid and semi-arid regions. These crusts play an important role in soil development and stability and improving nutritional conditions in areas possessing sparse vascular plant cover. In recent years, researchers examined a specific type of biological soil crusts c...
Conference Paper
Full-text available
The mineralogical composition of airborne dust changes depending on the mineralogy of the source area. The presence of specific minerals could be used as a tool to trace the sources of dust particles and this mineral may then be suggested as an origin-tracer. In other words, dust reflects the mineralogical composition of the source locations (M...
Conference Paper
Geomorphology and soil genesis and its development are closely related. Besides, soil-landscape studies provide a better understanding of soil forming processes. Therefore, the present research include investigates assessment of using of unmanned aerial vehicle (UAV) to reduce the time and the cost of geomorphology mapping in land phase level. For...
Article
Full-text available
Introduction and objectives: Although the Iberian Peninsula is a key area for understanding the Middle to Upper Paleolithic transition and the demise of the Neandertals, valuable evidence for these debates remains scarce and problematic in its interior regions. Sparse data supporting a late Neandertal persistence in the Iberian interior have been...
Data
Supporting tables on micromorphology and archeozoology and taphonomy. (PDF)
Article
Our study focuses on the ephemeral stream deposits of Wadi Selloum to identify phases of morphodynamic stability (pedogenesis) and activity (flooding) in the direct vicinity of the rock shelter of Ifri n'Ammar (NE Morocco). As one of the oldest settlement sites of anatomically modern humans (AMH) in North Africa, Ifri n'Ammar documents periodical o...
Conference Paper
Full-text available
The timing of Neanderthal disappearance in the Iberian Peninsula is a hotly debated subject in Palaeolithic archaeology. Several studies suggested a late survival in South and Central Iberia until about 32,000 year ago (ka), but were probably subject to significant age underestimation due to contamination of dating samples and/or lack of stratigrap...
Conference Paper
Full-text available
Archaeological sequences require accurate and precise numerical chronologies. Mostly, these sediments are strati-graphically complex and challenging to date. Post-depositional mixing, contamination from a collapsing cave roof, microdosimetry or insufficient bleaching prior to burial may influence the luminescence dating results. Careful sample sele...
Article
The effects of geological condition were assessed on density of Soil Organic Carbon (SOC) and Nitrogen (N) in a sequence of hillslope landscape, derived from different lithology i.e. loess deposit, reworked loess, marl with mixed siltstone and shale, reddish brown clay deposits and older loess in the semiarid area of northern Iran. However, other f...
Article
Full-text available
The late persistence in Southern Iberia of a Neandertal-associated Middle Paleolithic is supported by the archeological stratigraphy and the radiocarbon and luminescence dating of three newly excavated localities in the Mula basin of Murcia (Spain). At Cueva Antón, Mousterian layer I-k can be no more than 37,100 years-old. At La Boja, the basal Aur...