Robert J. Speakman’s research while affiliated with University of Georgia and other places

... Obsidian has also played an important role in creating and strengthening social connections among communities across time and in other parts of the world (e.g. Kristensen et al. 2019;Freund 2018;Lazzari and Sprovieri 2020;Peterson et al. 1997;Torrence 2005). All small groups depend on external links for their survival, because regular access to marriage partners is necessary for social and biological reproduction. ...

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Landscapes of exchange in the Willaumez Peninsula, West New Britain, Papua New Guinea

... Although the AAA method is ineffective in removing lignin (Hoper et al. 1997), previous research has shown that AAA pretreatment often performs as well as cellulose extraction, even for wood samples near the limit of 14 C dating (Southon and Magana 2010). This is true for bald cypress wood specifically (Napora et al. 2019). Considering the expected young sample ages and small sample sizes, the AAA protocol was the better fit for the goals of the dating project. ...

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“APPROXIMATE” WIGGLE-MATCH DATING APPLIED TO EARLY AMERICAN MUSEUM OBJECTS

... contemporary peer-reviewed literature (e.g., [24][25][26][27][28][29][30]). Their use, however, is an archaeological practice, having little to do with how people lived in the past. ...

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The Monongahela tradition in “real time”: Bayesian analysis of radiocarbon dates

... In addition to using historical population data to estimate historical cropland area, it is recommended that future studies incorporate archaeological data for pre-industrial land use area estimation, which can yield improved results (Stephens et al., 2019). The spatial pattern of historical land use can be more accurately simulated by utilizing historical land use maps and remote sensing archaeological data to optimize spatial allocation models. ...

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Croplands in Canada over the past millennium: A geographically explicit reconstruction

... 12.350 AP en Tse'K'wa (Charlie Lake Cave), o de ca. 13.300 AP en Wally's Beach (Driver et al., 1996;Fladmark et al., 2008;Kooyman et al., 2006;Waters et al., 2015;Brink et al., 2017) son muy tardías y lo mismo ocurre con las edades de sitios en la Columbia Británica de ca. 14.000 AP (Fedje & Matthewes, 2005;McLaren et al., 2020). ...

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De Beringia a América del Sur: modelos, asunciones y olvidos. Notas acerca del poblamiento de AméricaFrom Beringia to South America: Models, assumptions and forgetfulness. Notes on the peopling of AmericaDa Beríngia à América do Sul: modelos, suposições e omissões. Notas sobre o povoamento da América

... Only five respondents were retired. While only 20% of PhD recipients in anthropology obtain tenure-track positions (Platzer & Allison, 2018;Speakman et al., 2018), recruitment through organizations like AAA limited our reach to anthropologists no longer active in higher education. Figure 2 depicts respondents' anthropological subdiscipline and career stage at the time of the survey. ...

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Toward an anthropology that cares: Lessons from the Academic Carework project

... Disk-shaped talc beads were also found in the Arch Lake human burial site (eastern New Mexico, USA) dated to ca. 10.000 BP (Owsley et al. 2010), and talc beads and pendants, as well as evidences of their manufacture, have also been found in several Paleolithic Aurignacian sites in France (White 2007;White and Normand 2015). First Nations's groups also used steatite to produce beads and other objects since precontact times (Baron et al. 2016;Jones et al. 2018). Steatite objects are most commonly found in Iroquian sites in Eastern North America dating between the fifteenth and the sixteenth century (Jones et al. 2018). ...

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Personal adornments in West-Central Africa—the case study of a talc bead from the Kongo Kingdom (Mbanza Kongo, Angola)

... Within the continental United States and Canadian provinces, the principle sources of obsidian are found in the Pacific Northwest, as far east as South Dakota; and in the Southwest, particularly in Arizona and New Mexico [7][8][9]. While the use of obsidian is ubiquitous in the West, the pattern of archaeological occurrences East of the Rocky Mountains follows a distinct chronological pattern with obsidian appearing late as an important exotic good in the Middle Woodland Hopewell complex but only very sporadically before this [10,11]. Earlier occurrences are scattered across the Plains and further East but tend to be represented by very small numbers of flakes found within Late Archaic and Early Woodland contexts [12][13][14][15][16]. a1111111111 a1111111111 a1111111111 a1111111111 a1111111111 ...

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Central Oregon obsidian from a submerged early Holocene archaeological site beneath Lake Huron

... Women are less likely to obtain positions at PhD-granting universities, reducing the diversity of individuals trained in lithic analysis. As this pipeline issue has been discussed elsewhere (Speakman et al. 2018), we only mention its systemic nature. ...

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Lithics in the Maya Region: Exploring Gendered Trends in Research in the Last Decade

... Physical and chemical processes within uranium (U) plasmas present an essential aspect of accurate nuclear forensic analysis, with implications for several application areas ranging from nuclear fuel fabrication, reactor diagnostics, environmental monitoring, to safeguards and security. [1][2][3][4][5][6][7] Laserproduced U-containing plasmas can be used as a testbed for developing an understanding of reball plasma chemistry and combustion events, generation of particulates and debris in an explosive event or accident scenario, and to generate input for modeling tools. 8,9 Further, the analysis of laser-produced plasmas (LPP) via optical spectroscopy is a well-established approach for elemental and isotopic detection of U-bearing materials, even at stand-off distances. ...

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Time-resolved imaging of atoms and molecules in laser-produced uranium plasmas