Thomas W Stafford
Biographic Data
| ID | 72641 |
|---|---|
| NAME | Thomas W Stafford |
| GIVEN NAMES | Thomas W |
| FAMILY NAME | Stafford |
| SIGNATURE | STAFFORD T W |
| AFFILIATIONS | Institute of Arctic and Alpine Research |
| ORCID | 0000-0003-4094-9889 |
| VERIFIED | Yes |
| TOTAL WORKS | 48 |
| TOTAL CITATIONS | 360 |
| AUTHOR COUNT | 49 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1981 |
| LATEST PUBLICATION YEAR | 2025 |
| H-INDEX | 8 |
A human skeleton from Última Esperanza, South-West Patagonia, Chile
Despite over 130 years of systematic investigation, only a few ancient human skeletons have been recovered in southern Patagonia. These remains, dating to the Middle and Late Holocene, are typically found as isolated individuals or in small burial groups. In this paper, we present a multidisciplinary analysis of a human skeleton belonging to an elderly female discovered in the late 19th century in Mylodon Cave, Última Esperanza, southern Chile. T…
Re-dating the Early Upper Paleolithic Levels of Le Trou Magrite (Pont-à-Lesse, Belgium)
Hard Facts in an Imperfect Site
With the excuse of writing a critique to Domínguez-Rodrigo et al. (2021, duly replied here: Domínguez-Rodrigo & Baquedano, 2022), Holcomb et al. (this volume) intend to deny the proposal that the Arroyo del Vizcaíno (AdV, Fariña et al. 2014) is a site with evidence of human presence in South America before the LGM. Among the flaws of their critique, it must be mentioned that they decide to utterly ignore a few lines of evidence that sustain the q…
Étude génétique de la diversité et de l’alimentation de l’hyène des cavernes à partir de coprolithes de six sites du sud de la France
Afin d’obtenir des informations sur la diversité génétique et l’alimentation de l’hyène des cavernes, nous avons analysé l’ADN de coprolithes de six sites du sud de la France. Les sites correspondent à quatre grottes ardéchoises (Grotte‐aux‐Ours de Châteaubourg, Baume Néron et Trou‐du‐Renard de Soyons, Le Figuier) et deux grottes de l’Aude (Tournal, La Crouzade). Pour huit coprolithes de ces six sites, nous avons réalisé un séquençage global mass…
Elevated lead exposure in Roman occupants of Londinium
The evolution of metallurgical practices over several millennia has resulted in human exposures to a diverse variety of toxic elements. These exposures were not just confined to the metalworkers, but in many cases broadly impacted the larger community and society. The role of lead in Roman civilization is particularly fascinating, where the available evidence of lead use in a myriad of applications by Roman civilization suggests the potential for…
New Research at Paisley Caves
Paisley Caves in Oregon has become well known due to early dates, and human presence in the form of coprolites, found to contain ancient human DNA. Questions remain over whether the coprolites themselves are human, or whether the DNA is mobile in the sediments. This brief introduces new research applying an integrated analytical approach combining sediment micromorphology and lipid biomarker analysis, which aims to resolve these problems
Pre-Clovis occupation 14,550 years ago at the Page-Ladson site, Florida, and the peopling of the Americas
Page-Ladson, Florida, provides evidence of the oldest human occupation in the North American Gulf Coastal Plain at 14,550 B.P.
Younger Dryas Archaeology and Human Experience at the Paisley Caves in the Northern Great Basin
Youngest Radiocarbon Age for Jefferson's Ground Sloth, Megalonyx Jeffersonii (Xenarthra, Megalonychidae)
A partial skeleton of the extinct ground sloth, Megalonyx jeffersonii , recovered from a farm near Millersburg, Ohio in 1890, was radiocarbon dated for the first time. The ungual dated is part of a skeleton mounted for exhibit at the Orton Geological Museum at Ohio State University and was the first mounted skeleton of this animal. From its initial discovery the bones were treated with multiple organic compounds that had the potential to compromi…
The ancestry and affiliations of Kennewick Man
Kennewick Man, a 8,500-year-old male human skeleton discovered in Washington state, USA, has been the subject of scientific and legal controversy; here a DNA analysis shows that Kennewick Man is closer to modern Native Americans than to any other extant population worldwide. Kennewick Man is a 9,000-year-old male human skeleton discovered in Washington state, USA in 1996. The population affinities of the remains have been the subject of scientifi…
New 14C dates for Spring Creek and Mowbray Swamp megafauna
Bones from extinct Australian marsupials found at Spring Creek, Victoria, and in the Mowbray Swamp, Tasmania, have yielded scattered and anomalously young radiocarbon ages measured on collagen, gelatin or ultrafiltered gelatin. We resampled previously dated material from those two sites and from Mt Cripps, Tasmania, as well as a control sample from Zaglik, Russia, to compare chronologies based on XAD‐2 purified total amino acid fractions and coll…
Redating Fell's Cave, Chile and the Chronological Placement of the Fishtail Projectile Point
Fell's Cave lies near the Magellan Straits of South America's Southern Cone. This was the first site to provide evidence of a late Pleistocene occupation of South America, and it is the site where the Fishtail projectile point type was defined. Previous radiocarbon ages from Fell's Cave on charcoal samples from three hearths in the late Pleistocene artifact-bearing levels yielded dates ranging from ca. 11,000 to 10,100 radiocarbon years before pr…
New Evidence for a Possible Paleolithic Occupation of the Eastern North American Continental Shelf at the Last Glacial Maximum
The genome of a Late Pleistocene human from a Clovis burial site in western Montana
Late Pleistocene Human Skeleton and mtDNA Link Paleoamericans and Modern Native Americans
American Beauty Modern Native American ancestry traces back to an East Asian migration across Beringia. However, some Native American skeletons from the late Pleistocene show phenotypic characteristics more similar to other, more geographically distant, human populations. Chatters et al. (p. 750 ) describe a skeleton with a Paleoamerican phenotype from the eastern Yucatan, dating to approximately 12 to 13 thousand years ago, with a relatively com…
Upper Palaeolithic Siberian genome reveals dual ancestry of Native Americans
Redating the Mill Iron Site, Montana
The Paleoindian Goshen complex occurs in the northern Plains and eastern Rocky Mountains. Since its identification, there has been much discussion about the chronological placement of the Goshen complex. This is especially true because diagnostic Goshen projectile points occur stratigraphically below Folsom artifacts at two sites, and early dates from the Mill Iron site, Montana, and the Hell Gap site, Wyoming, have suggested that this point type…
Clovis Age Western Stemmed Projectile Points and Human Coprolites at the Paisley Caves
They Walked Together Paisley Cave in Oregon provides some of the earliest evidence for humans in North America. Jenkins et al. (p. 223 ) provide a wide variety of additional evidence of early human occupation of this site, including a series of radiocarbon ages extending back to nearly 12,500 radiocarbon years ago (about 14,500 calendar years ago). The find includes examples of projectile points representative of the Western Stemmed Tradition dat…
Species-specific responses of Late Quaternary megafauna to climate and humans
Pre-Clovis Mastodon Hunting 13,800 Years Ago at the Manis Site, Washington
Further dating of the Manis site shows that people were hunting mastodons in North America by 14,000 years ago.
AMS 14C analysis of Late Pleistocene non-analog faunal components from 21 cave deposits in southeastern North America
Arch Lake Woman
Origins and antiquity of the island fox ( Urocyon littoralis ) on California's Channel Islands
The island fox ( Urocyon littoralis ) is one of few reportedly endemic terrestrial mammals on California's Channel Islands. Questions remain about how and when foxes first colonized the islands, with researchers speculating on a natural, human-assisted, or combined dispersal during the late Pleistocene and/or Holocene. A natural dispersal of foxes to the northern Channel Islands has been supported by reports of a few fox bones from late Pleistoce…
Geoarchaeological investigations at the Topper and Big Pine Tree sites, Allendale County, South Carolina
Clovis and the American Mastodon at Big Bone Lick, Kentucky
Contemporaneity of people and the American mastodon (Mammut americanum) at Big Bone Lick, Kentucky, has been extensively debated for more than two hundred years. Newly interpreted stratigraphic excavations and direct AMS 14C measurements on mastodon bones from Big Bone Lick, Kentucky, indicate that the megafauna are a palimpsest of fossils spanning at least 1,200 calendar years (11,020 ± 30 to 12,210 ± 35 RC yr B.P.). The radiocarbon evidence ind…
The isotopic composition of carbon and nitrogen in individual amino acids isolated from modern and fossil proteins
Accelerator radiocarbon dating at the molecular level
Study of Bone Radiocarbon Dating Accuracy at the University of Arizona NSF Accelerator Facility for Radioisotope Analysis
Bone would seem to be an ideal material for 14 C dating because this calcified tissue contains 20 weight per cent protein. Fossil bone, however, can lose most of its original organic matter and frequently contains contaminants having different 14 C ages. Numerous 14 C dates on bone have been available to archaeologists and geologists but many age determinations have been inaccurate despite over 30 years of research in the field following the firs…
The Age of the Paleoindian Assemblage at Sheriden Cave, Ohio
Direct dating of a Paleoindian bone point from Sheriden Cave, Ohio, yielded a radiocarbon age of 10,915 ± 30 14C yr B.P. (UCIAMS-38249). This date was derived on highly purified bone collagen. This bone point was found in association with another bone projectile point and a reworked, fluted Clovis projectile point. The artifacts from Sheriden Cave fall within the age range of other Clovis sites in North America, dating to the late Allerød, before…
The Palaeoindian-Archaic transition in North America
The transition from Palaeoindian to Archaic societies in North America is often viewed as a linear progression over a brief but time-transgressive period. New evidence from the Wilson-Leonard site in Texas suggests social experimentation by Palaeoindians over a 2500-year period eventually resulted in Archaic societies. The process was neither short nor linear, and the evidence shows that different but contemporaneous lifeways existed in a variety…
AMS Radiocarbon Dating of the Type Plainview and Firstview (Paleoindian) Assemblages
Plainview and Firstview are two of the principal post-Folsom Paleoindian artifact assemblages on the Great Plains, but good radiometric age control for these artifact styles is relatively poor, due in part to lack of reliable age control on the type collections. This study reports the results of AMS-radiocarbon dating of specific amino acids from Bison antiquus bone associated with the type Plainview and Firstview assemblages from the Plainview a…
Alluvial Geology and Archaeological Potential of the Texas Southern High Plains
Alluvial geology studies indicate that valleys crossing the Texas High Plains have significant archaeological and paleontological potentials. Paleo-Indian and Ceramic/Historic sites are unexpectedly common, and are associated with ancient lake and marsh environments, spring deposits, entrenched meander necks, and buried strath terraces. Paleogeologic maps illustrate prehistoric topography and relate known sites to depositional environments. Archa…
Wilson-Leonard An 11,000-year Archeological Record of Hunter-Gatherers in Central Texas Volume IV
Study of the archeology of the Wilson-Leonard site has opened broad new vistas for the reexamination and improved interpretation of regional prehistory. Beyond that, it is of national importance in terms of both data and interpretation (for example, on the Paleoindian era) and the concepts used in its excavation and analysis. It is unique in other ways. In most cases, deep, stratified, multicomponent sites of this integrity are rarely excavated (…
Redating Fell's Cave, Chile and the Chronological Placement of the Fishtail Projectile Point
Fell's Cave lies near the Magellan Straits of South America's Southern Cone. This was the first site to provide evidence of a late Pleistocene occupation of South America, and it is the site where the Fishtail projectile point type was defined. Previous radiocarbon ages from Fell's Cave on charcoal samples from three hearths in the late Pleistocene artifact-bearing levels yielded dates ranging from ca. 11,000 to 10,100 radiocarbon years before pr…
Redating the Mill Iron Site, Montana
The Paleoindian Goshen complex occurs in the northern Plains and eastern Rocky Mountains. Since its identification, there has been much discussion about the chronological placement of the Goshen complex. This is especially true because diagnostic Goshen projectile points occur stratigraphically below Folsom artifacts at two sites, and early dates from the Mill Iron site, Montana, and the Hell Gap site, Wyoming, have suggested that this point type…
New Research at Paisley Caves
Paisley Caves in Oregon has become well known due to early dates, and human presence in the form of coprolites, found to contain ancient human DNA. Questions remain over whether the coprolites themselves are human, or whether the DNA is mobile in the sediments. This brief introduces new research applying an integrated analytical approach combining sediment micromorphology and lipid biomarker analysis, which aims to resolve these problems
Geoarchaeological investigations at the Topper and Big Pine Tree sites, Allendale County, South Carolina
AMS-radiocarbon dating of organic-poor lake sediment, an example from Linnévatnet, Spitsbergen, Svalbard
AMS-radiocarbon dating of specific organic fractions is used to evaluate sources of errors in dating of organic-poor lake sediment from Linnévatnet, a proglacial arctic lake. Dates on un differentiated (bulk) organic matter are much too old because of contamination from detrital coal. Attempts to remove coal from other organic matter were only partially successful, a consequence of the wide grain-size distribution of the coal. Even if coal contam…
New 14C dates for Spring Creek and Mowbray Swamp megafauna
Bones from extinct Australian marsupials found at Spring Creek, Victoria, and in the Mowbray Swamp, Tasmania, have yielded scattered and anomalously young radiocarbon ages measured on collagen, gelatin or ultrafiltered gelatin. We resampled previously dated material from those two sites and from Mt Cripps, Tasmania, as well as a control sample from Zaglik, Russia, to compare chronologies based on XAD‐2 purified total amino acid fractions and coll…
Elevated lead exposure in Roman occupants of Londinium
The evolution of metallurgical practices over several millennia has resulted in human exposures to a diverse variety of toxic elements. These exposures were not just confined to the metalworkers, but in many cases broadly impacted the larger community and society. The role of lead in Roman civilization is particularly fascinating, where the available evidence of lead use in a myriad of applications by Roman civilization suggests the potential for…
New dates for the Fontéchevade (Charente, France) Homo remains
Hard Facts in an Imperfect Site
With the excuse of writing a critique to Domínguez-Rodrigo et al. (2021, duly replied here: Domínguez-Rodrigo & Baquedano, 2022), Holcomb et al. (this volume) intend to deny the proposal that the Arroyo del Vizcaíno (AdV, Fariña et al. 2014) is a site with evidence of human presence in South America before the LGM. Among the flaws of their critique, it must be mentioned that they decide to utterly ignore a few lines of evidence that sustain the q…
Clovis and the American Mastodon at Big Bone Lick, Kentucky
Contemporaneity of people and the American mastodon (Mammut americanum) at Big Bone Lick, Kentucky, has been extensively debated for more than two hundred years. Newly interpreted stratigraphic excavations and direct AMS 14C measurements on mastodon bones from Big Bone Lick, Kentucky, indicate that the megafauna are a palimpsest of fossils spanning at least 1,200 calendar years (11,020 ± 30 to 12,210 ± 35 RC yr B.P.). The radiocarbon evidence ind…
Comparison of Manual and Automated Pretreatment Methods for AMS Radiocarbon Dating of Plant Fossils
A new automated pretreatment system for the preparation of materials submitted for accelerator mass spectrometry (AMS) analysis is less time-consuming and results in a higher sample yield. The new procedure was tested using two groups of plant fossils: one group was pretreated using the traditional method, and the second, using the automated pretreatment apparatus. We compared the time it took to complete the procedure and the amount of sample ma…
Alluvial Geology and Archaeological Potential of the Texas Southern High Plains
Alluvial geology studies indicate that valleys crossing the Texas High Plains have significant archaeological and paleontological potentials. Paleo-Indian and Ceramic/Historic sites are unexpectedly common, and are associated with ancient lake and marsh environments, spring deposits, entrenched meander necks, and buried strath terraces. Paleogeologic maps illustrate prehistoric topography and relate known sites to depositional environments. Archa…
Geoarchaeology of the Texas Southern High Plains
Geologic conclusions on Llano Estacado Late Quaternary stratigraphy are further quantified to strengthen previously published interpretations
Study of Bone Radiocarbon Dating Accuracy at the University of Arizona NSF Accelerator Facility for Radioisotope Analysis
Bone would seem to be an ideal material for 14 C dating because this calcified tissue contains 20 weight per cent protein. Fossil bone, however, can lose most of its original organic matter and frequently contains contaminants having different 14 C ages. Numerous 14 C dates on bone have been available to archaeologists and geologists but many age determinations have been inaccurate despite over 30 years of research in the field following the firs…
Radiocarbon, 13C and 15N analysis of fossil bone
Accelerator Radiocarbon Dates on Charcoal, Shell, and Human Bone from the Del Mar Site, California
Accelerator radiocarbon dates on shell, charcoal, and human bone samples are an indication that human activity at the Del Mar site dates to 5000 B.P. and possibly from 7000 B.P. The shell and charcoal fragments were dislocated stratigraphically by extensive bioturbation and provide evidence that accelerator dates on extremely small samples should be used with caution. Certain depositional environments will require multiple dating within a site be…
Accuracy of North American Human Skeleton Ages
Accelerator mass spectrometry (AMS) radiocarbon dates fail to provide conclusive evidence that all New World human fossils are younger than approximately 11,000 yr. Because fossil bones vary widely in preservation, their radiocarbon dates are not equally accurate. Molecular-level radiocarbon dating, which used individual amino acids to assess fossil diagenesis, revealed that dates on known-age, noncollagenous bone were underestimated by at least …
Chronology of Holocene vertebrate extinction in the Galápagos Islands
Eleven conventional and 15 AMS (accelerator mass spectrometer) radiocarbon dates establish chronologies for nine Holocene vertebrate fossil sites in the Galápagos Islands, Ecuador. A Holocene fossil record approaching 500,000 bones, more than 90% of which predate the arrival of people, shows that most or all cases of extinction or extirpation in the Galápagos occurred after first human contact in AD 1535. This is especially significant for two sp…
Accelerator radiocarbon dating at the molecular level
The isotopic composition of carbon and nitrogen in individual amino acids isolated from modern and fossil proteins
Dating of the Basal Aurignacian Sandwich at Abric Romanı́ (Catalunya, Spain) by Radiocarbon and Uranium-Series
AMS-radiocarbon dating of organic-poor lake sediment, an example from Linnévatnet, Spitsbergen, Svalbard
AMS-radiocarbon dating of specific organic fractions is used to evaluate sources of errors in dating of organic-poor lake sediment from Linnévatnet, a proglacial arctic lake. Dates on un differentiated (bulk) organic matter are much too old because of contamination from detrital coal. Attempts to remove coal from other organic matter were only partially successful, a consequence of the wide grain-size distribution of the coal. Even if coal contam…
Comparison of Manual and Automated Pretreatment Methods for AMS Radiocarbon Dating of Plant Fossils
A new automated pretreatment system for the preparation of materials submitted for accelerator mass spectrometry (AMS) analysis is less time-consuming and results in a higher sample yield. The new procedure was tested using two groups of plant fossils: one group was pretreated using the traditional method, and the second, using the automated pretreatment apparatus. We compared the time it took to complete the procedure and the amount of sample ma…
Radiocarbon Geochemistry of Modern and Ancient Arctic Lake Systems, Baffin Island, Canada
The accuracy of Arctic lake chronologies has been assessed by measuring the 14 C activities of modern carbon sources and applying these isotopic mass balances to dating fossil lake materials. Small ( 2 ) shallow ( 2 have soil and peat stratigraphic sections with 14 C activities ranging from 98 to 51% Modern. The 14 C activity of particulate organic carbon, dissolved organic carbon, and dissolved inorganic carbon from lake and stream waters ranges…
Late Holocene Eolian Activity in the Mineralogically Mature Nebraska Sand Hills
The age of sand dunes in the Nebraska Sand Hills has been controversial, with some investigators suggesting a full-glacial age and others suggesting that they were last active in the late Holocene. New accelerator mass spectrometry radiocarbon ages of unaltered bison bones and organic-rich sediments suggest that eolian sand deposition occurred at least twice in the past 3000 14 C yr B.P. in three widely separated localities and as many as three t…
Nonassociation of Paleoindians with AMS-Dated Late Pleistocene Mammals from the Dutchess Quarry Caves, New York
AMS 14 C ages of 10 bones of the caribou ( Rangifer tarandus ), flat-headed peccary ( Platygonus compressus ), and giant beaver ( Castoroides ohioensis ) from the Dutchess Quarry Caves, New York, range from 13,840 ± 80 to 11,670 ± 70 yr B.P. No bones from any of these species are demonstrably associated with Paleoindian artifacts (fluted points) or other cultural materials from the sites because the bones lack unequivocal stratigraphic associatio…
Wilson-Leonard An 11,000-year Archeological Record of Hunter-Gatherers in Central Texas Volume IV
Study of the archeology of the Wilson-Leonard site has opened broad new vistas for the reexamination and improved interpretation of regional prehistory. Beyond that, it is of national importance in terms of both data and interpretation (for example, on the Paleoindian era) and the concepts used in its excavation and analysis. It is unique in other ways. In most cases, deep, stratified, multicomponent sites of this integrity are rarely excavated (…
AMS Radiocarbon Dating of the Type Plainview and Firstview (Paleoindian) Assemblages
Plainview and Firstview are two of the principal post-Folsom Paleoindian artifact assemblages on the Great Plains, but good radiometric age control for these artifact styles is relatively poor, due in part to lack of reliable age control on the type collections. This study reports the results of AMS-radiocarbon dating of specific amino acids from Bison antiquus bone associated with the type Plainview and Firstview assemblages from the Plainview a…
The Palaeoindian-Archaic transition in North America
The transition from Palaeoindian to Archaic societies in North America is often viewed as a linear progression over a brief but time-transgressive period. New evidence from the Wilson-Leonard site in Texas suggests social experimentation by Palaeoindians over a 2500-year period eventually resulted in Archaic societies. The process was neither short nor linear, and the evidence shows that different but contemporaneous lifeways existed in a variety…
Early human remains from Baño Nuevo-1 cave, central Patagonian Andes, Chile
Latest Pleistocene paleoecology of Jefferson's ground sloth ( Megalonyx jeffersonii ) and elk-moose ( Cervalces scotti ) in northern Illinois
New records of Jefferson's ground sloth ( Megalonyx jeffersonii ) and elk-moose ( Cervalces scotti ) from Lang Farm provide the first precise temporal correlation of these taxa with the specific environments inhabited by them near the time of their extinction. Six AMS 14 C measurements establish an age of 11,405 ± 50 14 C yr B.P. for Lang Farm Cervalces and an age of 11,430 ± 60 or 11,485 ± 40 14 C yr B.P. for the Megalonyx . These measurements r…
A geoarchaeological evaluation of a reported late Pleistocene human burial from Brazoria County, Texas
New dates for the Fontéchevade (Charente, France) Homo remains
Lakeside Cemeteries in the Sahara
BACKGROUND: Approximately two hundred human burials were discovered on the edge of a paleolake in Niger that provide a uniquely preserved record of human occupation in the Sahara during the Holocene ( approximately 8000 B.C.E. to the present). Called Gobero, this suite of closely spaced sites chronicles the rapid pace of biosocial change in the southern Sahara in response to severe climatic fluctuation. METHODOLOGY/PRINCIPAL FINDINGS: Two main oc…
Origins and antiquity of the island fox ( Urocyon littoralis ) on California's Channel Islands
The island fox ( Urocyon littoralis ) is one of few reportedly endemic terrestrial mammals on California's Channel Islands. Questions remain about how and when foxes first colonized the islands, with researchers speculating on a natural, human-assisted, or combined dispersal during the late Pleistocene and/or Holocene. A natural dispersal of foxes to the northern Channel Islands has been supported by reports of a few fox bones from late Pleistoce…
Geoarchaeological investigations at the Topper and Big Pine Tree sites, Allendale County, South Carolina
Geography (36 works) · Archaeology (35 works) · Pleistocene-Era Hominins and Archaeology (29 works) · Radiocarbon dating (27 works) · Archaeology and ancient environmental studies (26 works) · Geology (24 works) · Geology (23 works) · Paleontology (22 works) · Biology (19 works) · Paleontology (19 works)