Jim I Mead
Datos Biográficos
| ID | 231467 |
|---|---|
| NOMBRE | Jim I Mead |
| NOMBRES | Jim I |
| APELLIDO | Mead |
| FIRMA | MEAD J I |
| AFILIACIONES | Northern Arizona University |
| ORCID | 0000-0002-4975-022X |
| VERIFICADO | Sí |
| TOTAL DE OBRAS | 35 |
| TOTAL DE CITAS | 46 |
| TOTAL COMO AUTOR | 35 |
| TOTAL COMO EDITOR | 0 |
| PRIMER AÑO DE PUBLICACIÓN | 1978 |
| AÑO MÁS RECIENTE DE PUBLICACIÓN | 2026 |
| ÍNDICE H | 5 |
Age reassignment using luminescence dating for The Mammoth Site, Black Hills, South Dakota, USA
The Mammoth Site (MS) at Hot Springs, South Dakota, provides a unique opportunity to reconstruct paleoenvironmental conditions on the Northern Great Plains of the United States. Previous radiocarbon analyses of mammoth bone apatite suggested the MS sinkhole was deposited ∼42–23 cal ka BP. However, two U-series ages and one thermoluminescence (TL) age ranged between 150 and 101 ka, suggesting the bones were considerably older. We analyzed six samp…
Late Pleistocene Paramylodon harlani (Xenarthra, Mylodontidae) from Térapa, Sonora, Mexico
While the North American mylodont sloth, Parmylodon harlani, has been identified in multiple localities in Mexico, most of these records are from the southern part of the country. Consequently, there is a large geographic gap between its distribution in Mexico and the more northern records of the species in the United States. The recovery of the remains of multiple individuals of Paramylodon harlani, as part of a late Pleistocene fauna in San Cle…
Deep‐water delivery model of Ruppia seeds to a nearshore/terrestrial setting and its chronological implications for Late Pleistocene footprints, Tularosa Basin, New Mexico
Ruppia cirrhosa ( Ruppia ) seed layers have been used to constrain the age of footprints along the eastern shoreline of Paleolake Otero in southern New Mexico to around 21,000–23,000 calibrated years before the present. However, there remain two unresolved questions that can affect the reliability of the age(s) of the footprints. First, what is the nature of the geological context of the seed layers? Second, did the hard‐water effect impact the a…
A Newly Identified Younger Dryas Component in Eagle Cave, Texas
Recent excavations by the Ancient Southwest Texas Project of Texas State University sampled a previously undocumented Younger Dryas component from Eagle Cave in the Lower Pecos Canyonlands of Texas. This stratified assemblage consists of bison (Bison antiquus) bones in association with lithic artifacts and a hearth. Bayesian modeling yields an age of 12,660-12,480 cal BP, and analyses indicate behaviors associated with the processing of a juvenil…
Paleobiology of a large mammal community from the late Pleistocene of Sonora, Mexico
A paleontological deposit near San Clemente de Térapa represents one of the very few Rancholabrean North American Land Mammal Age sites within Sonora, Mexico. During that time, grasslands were common, and the climate included cooler and drier summers and wetter winters than currently experienced in northern Mexico. Here, we demonstrate restructuring in the mammalian community associated with environmental change over the past 40,000 years at Téra…
Do Uncharred Plants Preserve Original Carbon and Nitrogen Isotope Compositions
Molecular identification of paleofeces from Bechan Cave, southeastern Utah, USA
Holocene vertebrates from a dry cave on Eleuthera Island, Commonwealth of The Bahamas
We report a mid- to late-Holocene, non-cultural vertebrate assemblage from Garden Cave (site EL-229), Eleuthera Island, The Bahamas, with 2450 fossils representing 26 species. The chronology is based on accelerator mass spectrometer (AMS) radiocarbon ( 14 C) dates determined directly on individual bones of the hutia ( Geocapromys ingrahami), an extirpated species of rodent that dominates the bone assemblage at Garden Cave. Four AMS 14 C dates fro…
New remains of Sinomastodon yangziensis (Proboscidea, Gomphotheriidae) from Sanhe karst Cave, with discussion on the evolution of Pleistocene Sinomastodon in South China
First mandible and deciduous dentition of juvenile individuals of Sinomastodon (Proboscidea, Mammalia) from the Early Pleistocene Renzidong Cave of eastern China
New remains of Rhinoceros (Rhinocerotidae, Perissodactyla, Mammalia) associated with Gigantopithecus blacki from the Early Pleistocene Yanliang Cave, Fusui, South China
Pleistocene lizards (Squamata, Reptilia) from the karst caves in Chongzuo, Guangxi, southern China
Late-Holocene faunal and landscape change in the Bahamas
We report an intertidal, bone-rich peat deposit on the windward (Atlantic Ocean) coast of Abaco, The Bahamas. The age of the Gilpin Point peat ( c. 950–900 cal. yr BP) is based on five overlapping radiocarbon dates (one each from single pieces of wood of buttonwood Conocarpus erectus and sabal palm Sabal palmetto, and single bones of the Cuban crocodile Crocodylus rhombifer, Albury’s tortoise Chelonoidis alburyorum, and green turtle Chelonia myda…
New data on Leptobos crassus (Artiodactyla, Bovidae) from Renzidong Cave, Early Pleistocene (Nihewanian) of Anhui, China, and an overview of the genus
The biogeographic histories of Pinus edulis and Pinus monophylla over the last 50,000 years
Late Pleistocene (Rancholabrean) Cynomys (Rodentia, Sciuridae
Years of vegetation and climate history on the Colorado Plateau, Utah and Arizona, USA
Sixty packrat middens were collected in Canyonlands and Grand Canyon National Parks, and these series include sites north of areas that produced previous detailed series from the Colorado Plateau. The exceptionally long time series obtained from each of three sites (> 48,000 14 C yr BP to present) include some of the oldest middens yet discovered. Most middens contain a typical late-Wisconsinan glaciation mixture of mesic and xeric taxa, evidence…
Dung, diet, and the paleoenvironment of the extinct shrub-ox ( Euceratherium Collinum ) on the Colorado Plateau, USA
Fossil remains of Euceratherium collinum (extinct shrub-ox) have been found throughout North America, including the Grand Canyon. Recent finds from the Escalante River Basin in southern Utah further extend the animal's range into the heart of the Colorado Plateau. E. collinum teeth and a metapodial condyle (foot bone) have been recovered in association with large distinctively shaped dung pellets, a morphology similar to a ‘Hershey's Kiss’ (HK), …
Multiple approaches to formation processes
Excavations in 1964 at the Pine Spring site in southwest Wyoming concluded that the site contains three cultural occupation levels; the earliest allegedly dates to the terminal Pleistocene and is associated with megafauna. However, excavations in 1998 and 2000, and analysis of the stratigraphy, AMS dates, micromorphology, and artifact carbonate isotopes, along with debitage refitting, density, orientation, inclination, burning, and trample damage…
Bisonandbosfrom Protohistoric and Historic Localities in the San Rafael Valley, Arizona
Two sub-fossil localities in San Rafael Valley, Santa Cruz County, provide new evidence about the timing and occurrence of Bison (bison) and Bos (cattle) in southeastern Arizona. A portion of the young male Bison skull was radiocarbon dated and produced a conventional age of 370±40 BP (intercept date of Cal AD 1490). Charcoal recovered in association with the articulated Bos skeleton produced a conventional age of 250±30 BP (intercept date of CAL…
Late Quaternary Spring-Fed Deposits of the Grand Canyon and Their Implication for Deep Lava-Dammed Lakes
One of the most intriguing episodes in the Quaternary evolution of the Grand Canyon of the Colorado River, Arizona, was the development of vast lakes that are thought to have backed up behind lava erupted into the gorge. Stratigraphic evidence for these deep lava-dammed lakes is expectedly sparse. Possible lacustrine deposits at six areas in the eastern canyon yielded no compelling evidence for sediment deposited in a deep lake. At two of the sit…
Skeleton of Extinct North American Sea Mink ( Mustela macrodon )
Mustela macrodon (extinct sea mink) is known only from prehistoric and historic Native American shell middens dating less than 5100 years old along coastal islands of the Gulf of Maine, northeastern North America. The species is distinct from all known extant subspecies of M. vison (American mink) but still belongs to the North American subgenus Vison. Metric comparisons between M. macrodon and five subspecies of M. vison, using skull, mandible, …
Ochotona (Lagomorpha) from Late Quaternary Cave Deposits in Eastern North America
Pikas ( Ochtona )—small gnawing mammals, related to rabbits—range today throughout parts of the Northern Hemisphere, but had a wider distribution during the Pleistocene. Nine caves from northeastern North America (a region not occupied by pikas today) have Pleistocene deposits containing remains of Ochotona . We examine 526 fossil specimens (ranging in age from approximately 850,000 to 8670 yr B.P.) from five of these caves. Two morphological for…
Split-Twig Figurines in Grand Canyon, Arizona
Five previously unreported, relatively undisturbed caves in the high vertical cliffs of Grand Canyon National Park, Arizona, provide new information on Archaic culture and the function of split-twig figurines. Radiocarbon dates indicate cultural use of these sites between 4390–3700 B.P. and correspond in age with similar localities in the Grand Canyon. Unlike most other Archaic sites in the Grand Canyon, these sites contain numerous rock cairns a…
Mictomys Borealis (Northern Bog Lemming) and the Wisconsin Paleoecology of the East-Central Great Basin
Teeth of northern bog lemming, Mictomys borealis , are reported from Cathedral and Smith Creek caves and represent the first Wisconsin remains of the genus from the Great Basin. Specimens from Cathedral Cave, Snake Range, are associated with U-series ages of 24,000 to 15,000 yr B.P. Previous work with pollen and packrat middens, dating to the same age as the Mictomys , indicate that Smith Creek Canyon contained a riparian, locally mesic community…
Isotope Dating of Pleistocene Dung Deposits From the Colorado Plateau, Arizona and Utah
Identified dung and keratinous remains of large mammals are considered the most reliable materials to 14 C date, when the initial question includes the application of the date to the time of local extirpation and extinction. The Colorado Plateau provides a unique preservation habitat (desiccation), found in greater abundance of deposits than anywhere else in North America. We review 20 localities from the Colorado Plateau that contain dung of meg…
Is It Really That Old? A Comment about the Meadowcroft Rockshelter 'Overview
There is an apparent discrepancy in the reported data from Meadowcroft Rockshelter. Radiocarbon dates from Stratum IIa appear to indicate a Wisconsinan full-glacial occupation by man in the shelter. The recovered fauna and flora are discordant with other local Wisconsinan-age fossils
Late-Holocene faunal and landscape change in the Bahamas
We report an intertidal, bone-rich peat deposit on the windward (Atlantic Ocean) coast of Abaco, The Bahamas. The age of the Gilpin Point peat ( c. 950–900 cal. yr BP) is based on five overlapping radiocarbon dates (one each from single pieces of wood of buttonwood Conocarpus erectus and sabal palm Sabal palmetto, and single bones of the Cuban crocodile Crocodylus rhombifer, Albury’s tortoise Chelonoidis alburyorum, and green turtle Chelonia myda…
New data on Leptobos crassus (Artiodactyla, Bovidae) from Renzidong Cave, Early Pleistocene (Nihewanian) of Anhui, China, and an overview of the genus
Archaeology, Alluvium, and Cave Stratigraphy
Excavations for paleontological remains in Bechan Cave, Utah, also have produced significant cultural information. Episodes of cultural activity during the past 8,000 years, preserved within the cave, are correlated with alluvial events in an adjacent canyon. Preliminary analyses indicate that human occupation of both the canyon floor and the cave was determined by changing fluvial regimes. No cultural evidence was found in either the canyon or t…
Bisonandbosfrom Protohistoric and Historic Localities in the San Rafael Valley, Arizona
Two sub-fossil localities in San Rafael Valley, Santa Cruz County, provide new evidence about the timing and occurrence of Bison (bison) and Bos (cattle) in southeastern Arizona. A portion of the young male Bison skull was radiocarbon dated and produced a conventional age of 370±40 BP (intercept date of Cal AD 1490). Charcoal recovered in association with the articulated Bos skeleton produced a conventional age of 250±30 BP (intercept date of CAL…
Arizona Radiocarbon Dates Ix
The carbon isotope analyses reported here include all radiocarbon dates run on packrat middens in the United States and Mexico by the Arizona radiocarbon laboratory through October 1977. All samples described below report dates by CO 2 (0.5 or 2.0L) counting. Age calculations are based on a 14 C half-life of 5568 years, using 0.949 NBS oxalic acid as the modern value. Errors, based on counting statistics, are quoted to ± 1δ; infinite ages quoted …
Do Uncharred Plants Preserve Original Carbon and Nitrogen Isotope Compositions
Holocene vertebrates from a dry cave on Eleuthera Island, Commonwealth of The Bahamas
We report a mid- to late-Holocene, non-cultural vertebrate assemblage from Garden Cave (site EL-229), Eleuthera Island, The Bahamas, with 2450 fossils representing 26 species. The chronology is based on accelerator mass spectrometer (AMS) radiocarbon ( 14 C) dates determined directly on individual bones of the hutia ( Geocapromys ingrahami), an extirpated species of rodent that dominates the bone assemblage at Garden Cave. Four AMS 14 C dates fro…
Split-Twig Figurines in Grand Canyon, Arizona
Five previously unreported, relatively undisturbed caves in the high vertical cliffs of Grand Canyon National Park, Arizona, provide new information on Archaic culture and the function of split-twig figurines. Radiocarbon dates indicate cultural use of these sites between 4390–3700 B.P. and correspond in age with similar localities in the Grand Canyon. Unlike most other Archaic sites in the Grand Canyon, these sites contain numerous rock cairns a…
Multiple approaches to formation processes
Excavations in 1964 at the Pine Spring site in southwest Wyoming concluded that the site contains three cultural occupation levels; the earliest allegedly dates to the terminal Pleistocene and is associated with megafauna. However, excavations in 1998 and 2000, and analysis of the stratigraphy, AMS dates, micromorphology, and artifact carbonate isotopes, along with debitage refitting, density, orientation, inclination, burning, and trample damage…
Arizona Radiocarbon Dates Ix
The carbon isotope analyses reported here include all radiocarbon dates run on packrat middens in the United States and Mexico by the Arizona radiocarbon laboratory through October 1977. All samples described below report dates by CO 2 (0.5 or 2.0L) counting. Age calculations are based on a 14 C half-life of 5568 years, using 0.949 NBS oxalic acid as the modern value. Errors, based on counting statistics, are quoted to ± 1δ; infinite ages quoted …
Is It Really That Old? A Comment about the Meadowcroft Rockshelter 'Overview
There is an apparent discrepancy in the reported data from Meadowcroft Rockshelter. Radiocarbon dates from Stratum IIa appear to indicate a Wisconsinan full-glacial occupation by man in the shelter. The recovered fauna and flora are discordant with other local Wisconsinan-age fossils
The Last 30,000 Years of Faunal History within the Grand Canyon, Arizona
The vertebrate fauna of the last 30,000 radiocarbon years in the Grand Canyon is reviewed. Faunas accompanied with 92 14 C dates have been analyzed from nine cave sites (four systematically excavated) and 50 packrat middens. Reasonably precise chronological and environmental data of late Pleistocene and Holocene age were obtained through dung studies in Rampart, Muav, and Stanton's Caves; from the numerous packrat middens; and from a ringtail ref…
Late Quaternary Environments and Biogeography in the Great Basin
Plant and animal remains found in packrat ( Neotoma spp.) middens and cave fill from the eastern and southern Great Basin region reveal the presence of subalpine conifers and boreal mammals at relatively low elevations during the Late Wisconsin. Limber pine ( Pinus flexilis ) and bristlecone pine ( P. longaeva ) were important in the late Pleistocene plant communities throughout this region. Spruce ( Picea cf. engelmannii ) and common juniper ( J…
The Timing of Late Pleistocene Mammalian Extinctions in North America
More than 375 14 C dates from 150 fossil sites in North America have been analyzed to evaluate the question of extinction of Late Pleistocene megafauna. When critically evaluated, no 14 C ages for any extinct Pleistocene genera are younger than 10,000 yr B.P.
Dung of Mammuthus in the Arid Southwest, North America
The discovery of a unique organic deposit in a dry cave on the Colorado Plateau, southern Utah, permits the first comparison of the physical characteristics and the diet of the dung of the extinct mammoths from the arid Southwest, North America, with that of mammoths from Siberia and northern China, the only other known locations of such remains. The deposit buried beneath sand and rockfall is composed primarily of mammoth dung, estimated at over…
Environments and Extinctions
Extinct Mountain Goat ( Oreamnos harringtoni ) in Southeastern Utah
The extinct Harrington's mountain goat ( Oreamnos harringtoni Stock) is predominantly known from dry cave localities in the Grand Canyon, Arizona, in addition to two sites in the Great Basin, Nevada, and from San Josecito Cave, Nuevo Leon, Mexico. A dry shelter in Natural Bridges National Monument, on the central Colorado Plateau, southeastern Utah, preserves numerous remains of the extinct mountain goat in addition to pack rat middens. Remains f…
Archaeology, Alluvium, and Cave Stratigraphy
Excavations for paleontological remains in Bechan Cave, Utah, also have produced significant cultural information. Episodes of cultural activity during the past 8,000 years, preserved within the cave, are correlated with alluvial events in an adjacent canyon. Preliminary analyses indicate that human occupation of both the canyon floor and the cave was determined by changing fluvial regimes. No cultural evidence was found in either the canyon or t…
Mictomys Borealis (Northern Bog Lemming) and the Wisconsin Paleoecology of the East-Central Great Basin
Teeth of northern bog lemming, Mictomys borealis , are reported from Cathedral and Smith Creek caves and represent the first Wisconsin remains of the genus from the Great Basin. Specimens from Cathedral Cave, Snake Range, are associated with U-series ages of 24,000 to 15,000 yr B.P. Previous work with pollen and packrat middens, dating to the same age as the Mictomys , indicate that Smith Creek Canyon contained a riparian, locally mesic community…
Isotope Dating of Pleistocene Dung Deposits From the Colorado Plateau, Arizona and Utah
Identified dung and keratinous remains of large mammals are considered the most reliable materials to 14 C date, when the initial question includes the application of the date to the time of local extirpation and extinction. The Colorado Plateau provides a unique preservation habitat (desiccation), found in greater abundance of deposits than anywhere else in North America. We review 20 localities from the Colorado Plateau that contain dung of meg…
Split-Twig Figurines in Grand Canyon, Arizona
Five previously unreported, relatively undisturbed caves in the high vertical cliffs of Grand Canyon National Park, Arizona, provide new information on Archaic culture and the function of split-twig figurines. Radiocarbon dates indicate cultural use of these sites between 4390–3700 B.P. and correspond in age with similar localities in the Grand Canyon. Unlike most other Archaic sites in the Grand Canyon, these sites contain numerous rock cairns a…
Ochotona (Lagomorpha) from Late Quaternary Cave Deposits in Eastern North America
Pikas ( Ochtona )—small gnawing mammals, related to rabbits—range today throughout parts of the Northern Hemisphere, but had a wider distribution during the Pleistocene. Nine caves from northeastern North America (a region not occupied by pikas today) have Pleistocene deposits containing remains of Ochotona . We examine 526 fossil specimens (ranging in age from approximately 850,000 to 8670 yr B.P.) from five of these caves. Two morphological for…
Skeleton of Extinct North American Sea Mink ( Mustela macrodon )
Mustela macrodon (extinct sea mink) is known only from prehistoric and historic Native American shell middens dating less than 5100 years old along coastal islands of the Gulf of Maine, northeastern North America. The species is distinct from all known extant subspecies of M. vison (American mink) but still belongs to the North American subgenus Vison. Metric comparisons between M. macrodon and five subspecies of M. vison, using skull, mandible, …
Late Quaternary Spring-Fed Deposits of the Grand Canyon and Their Implication for Deep Lava-Dammed Lakes
One of the most intriguing episodes in the Quaternary evolution of the Grand Canyon of the Colorado River, Arizona, was the development of vast lakes that are thought to have backed up behind lava erupted into the gorge. Stratigraphic evidence for these deep lava-dammed lakes is expectedly sparse. Possible lacustrine deposits at six areas in the eastern canyon yielded no compelling evidence for sediment deposited in a deep lake. At two of the sit…
Bisonandbosfrom Protohistoric and Historic Localities in the San Rafael Valley, Arizona
Two sub-fossil localities in San Rafael Valley, Santa Cruz County, provide new evidence about the timing and occurrence of Bison (bison) and Bos (cattle) in southeastern Arizona. A portion of the young male Bison skull was radiocarbon dated and produced a conventional age of 370±40 BP (intercept date of Cal AD 1490). Charcoal recovered in association with the articulated Bos skeleton produced a conventional age of 250±30 BP (intercept date of CAL…
Multiple approaches to formation processes
Excavations in 1964 at the Pine Spring site in southwest Wyoming concluded that the site contains three cultural occupation levels; the earliest allegedly dates to the terminal Pleistocene and is associated with megafauna. However, excavations in 1998 and 2000, and analysis of the stratigraphy, AMS dates, micromorphology, and artifact carbonate isotopes, along with debitage refitting, density, orientation, inclination, burning, and trample damage…
Dung, diet, and the paleoenvironment of the extinct shrub-ox ( Euceratherium Collinum ) on the Colorado Plateau, USA
Fossil remains of Euceratherium collinum (extinct shrub-ox) have been found throughout North America, including the Grand Canyon. Recent finds from the Escalante River Basin in southern Utah further extend the animal's range into the heart of the Colorado Plateau. E. collinum teeth and a metapodial condyle (foot bone) have been recovered in association with large distinctively shaped dung pellets, a morphology similar to a ‘Hershey's Kiss’ (HK), …
Years of vegetation and climate history on the Colorado Plateau, Utah and Arizona, USA
Sixty packrat middens were collected in Canyonlands and Grand Canyon National Parks, and these series include sites north of areas that produced previous detailed series from the Colorado Plateau. The exceptionally long time series obtained from each of three sites (> 48,000 14 C yr BP to present) include some of the oldest middens yet discovered. Most middens contain a typical late-Wisconsinan glaciation mixture of mesic and xeric taxa, evidence…
Late Pleistocene (Rancholabrean) Cynomys (Rodentia, Sciuridae
The biogeographic histories of Pinus edulis and Pinus monophylla over the last 50,000 years
New remains of Sinomastodon yangziensis (Proboscidea, Gomphotheriidae) from Sanhe karst Cave, with discussion on the evolution of Pleistocene Sinomastodon in South China
First mandible and deciduous dentition of juvenile individuals of Sinomastodon (Proboscidea, Mammalia) from the Early Pleistocene Renzidong Cave of eastern China
New remains of Rhinoceros (Rhinocerotidae, Perissodactyla, Mammalia) associated with Gigantopithecus blacki from the Early Pleistocene Yanliang Cave, Fusui, South China
Pleistocene lizards (Squamata, Reptilia) from the karst caves in Chongzuo, Guangxi, southern China
Archaeology (30 obras) · Geography (30 obras) · Biology (22 obras) · Pleistocene (22 obras) · Cave (17 obras) · Evolution and Paleontology Studies (17 obras) · Geology (16 obras) · Paleontology (16 obras) · Pleistocene-Era Hominins and Archaeology (16 obras) · Ecology (15 obras)