scholarly journals Pre-Clovis occupation 14,550 years ago at the Page-Ladson site, Florida, and the peopling of the Americas

2016 ◽  
Vol 2 (5) ◽  
pp. e1600375 ◽  
Author(s):  
Jessi J. Halligan ◽  
Michael R. Waters ◽  
Angelina Perrotti ◽  
Ivy J. Owens ◽  
Joshua M. Feinberg ◽  
...  
Keyword(s):  
Late Pleistocene ◽  
Coastal Plain ◽  
Stone Tools ◽  
Gulf Coastal Plain ◽  
Hunter Gatherers ◽  
Marine Transgression ◽  
Peopling Of The Americas ◽  
Aucilla River ◽  
Geological Context

Stone tools and mastodon bones occur in an undisturbed geological context at the Page-Ladson site, Florida. Seventy-one radiocarbon ages show that ~14,550 calendar years ago (cal yr B.P.), people butchered or scavenged a mastodon next to a pond in a bedrock sinkhole within the Aucilla River. This occupation surface was buried by ~4 m of sediment during the late Pleistocene marine transgression, which also left the site submerged.Sporormiellaand other proxy evidence from the sediments indicate that hunter-gatherers along the Gulf Coastal Plain coexisted with and utilized megafauna for ~2000 years before these animals became extinct at ~12,600 cal yr B.P. Page-Ladson expands our understanding of the earliest colonizers of the Americas and human-megafauna interaction before extinction.

Early Pliocene horses from late Pleistocene fluvial deposits, Gulf Coastal Plain, south Texas

1991 ◽  
Vol 65 (6) ◽  
pp. 995-1006 ◽  
Author(s):  
Jon A. Baskin
Keyword(s):  
Late Pleistocene ◽  
Coastal Plain ◽  
South Texas ◽  
Gulf Coastal Plain ◽  
Early Pliocene ◽  
Fluvial Deposits ◽  
Valley Fill ◽  
Late Wisconsinan ◽  
Sand And Gravel ◽  
Nueces River

Isolated teeth and post-cranial elements of fossil vertebrates were recovered from sand and gravel pits in valley fill and terrace deposits along the Nueces River in San Patricio and Nueces Counties, Texas. A log from the valley fill deposit has been radiocarbon dated at 13,230 ± 110 BP. The fauna is mixed and comprises typical late Pleistocene taxa and relatively abundant remains of early Pliocene (latest Hemphillian) horses. The latter group includes Astrohippus albidens (Mooser), Nannippus spp., Neohipparion eurystyle (Cope), and a derived species of either Calippus or Pseudhipparion. Many of these specimens show little or no evidence of abrasion, in spite of the fact that they may have been transported at least 12–25 km. The source beds for these early Pliocene horses are unknown, but the fossils were probably eroded from older, updip sediments of the upper Goliad Formation during a low stand of sea level at the end of the Pleistocene and deposited during the late Wisconsinan.

Stable Isotope Study of Hunter-Gatherer-Fisher Diet, Mobility, and Intensification on the Texas Gulf Coastal Plain

2011 ◽  
Vol 76 (4) ◽  
pp. 709-751 ◽  
Author(s):  
Robert J. Hard ◽  
M. Anne Katzenberg
Keyword(s):  
Stable Isotope ◽  
Coastal Plain ◽  
Gulf Coastal Plain ◽  
Plant Resources ◽  
Hunter Gatherers ◽  
Long Term Stability ◽  
Early Archaic ◽  
Isotope Study ◽  
Late Prehistoric Period ◽  
Stable Isotope Study

The Gulf Coastal Plain of Texas was populated by hunter-gatherers from the Early Archaic (ca. 7000 B.P.) through to the Late Prehistoric period (ca. A.D. 700-1400). In order to characterize past dietary adaptations along the coast and further inland, stable isotopes of carbon and nitrogen were analyzed in preserved bone from 198 individuals from mortuary sites. In addition, 140 samples of faunal bone were analyzed to elucidate the stable isotope ecology for each region. The results indicate long-term stability in dietary adaptations with regional variation among coastal, riverine, and inland groups, including an early and, substantial, use of freshwater and marine resources. There is also evidence for constrained mobility and increasing use of plant resources within regions as populations increased in size and density.

Allometry and Paleoecology of Medial Miocene Dwarf Rhinoceroses from the Texas Gulf Coastal Plain

Paleobiology ◽  
1982 ◽  
Vol 8 (1) ◽  
pp. 16-30 ◽  
Author(s):  
Donald R. Prothero ◽  
Paul C. Sereno
Keyword(s):  
Body Size ◽  
Coastal Plain ◽  
Sympatric Species ◽  
High Plains ◽  
Gulf Coastal Plain ◽  
Canine Tooth ◽  
Positive Allometry ◽  
Mammalian Faunas ◽  
The Common ◽  
Limb Proportions

Barstovian (medial Miocene) mammalian faunas from the Texas Gulf Coastal Plain contained four apparently sympatric species of rhinoceroses: the common forms Aphelops megalodus and Teleoceras medicornutus, a dwarf Teleoceras, and a dwarf Peraceras. Previous work has suggested positive allometry in tooth area with respect to body size in several groups of mammals, i.e., larger mammals have relatively more tooth area. However, dwarfing lineages were shown to have relatively more tooth area for their body size. Our data show no significant allometry in post-canine tooth area of either artiodactyls or ceratomorphs. Similarly, dwarf rhinoceroses and hippopotami show no more tooth area than would be predicted for their size. Limbs are proportionately longer and more robust in larger living ceratomorphs (rhinos and tapirs) than predicted by previous authors. Limb proportions of both dwarf rhinoceroses and dwarf hippopotami are even more robust than in their living relatives.The high rhinoceros diversity reflects the overall high diversity of Barstovian faunas from the Texas Gulf Coastal Plain. The first appearance of several High Plains mammals in these faunas indicates “ecotone”-like conditions as faunal composition changed. Study of living continental dwarfs shows that there is commonly an ecological separation between browsing forest dwarfs and their larger forebears, which are frequently savannah grazers. This suggests that the dwarf rhinoceroses might have been forest browsers which were sympatric with the larger grazing rhinos of the High Plains during the Barstovian invasion. The continental dwarf model also suggests that insular dwarfism may be explained by the browsing food resources that predominate on islands.

Forest Ecosystems of a Lower Gulf Coastal Plain Landscape: Multifactor Classification and Analysis

2001 ◽  
Vol 128 (1) ◽  
pp. 47 ◽  
Author(s):  
P. Charles Goebel ◽  
Brian J. Palik ◽  
L. Katherine Kirkman ◽  
Mark B. Drew ◽  
Larry West ◽  
...  
Keyword(s):  
Coastal Plain ◽  
Forest Ecosystems ◽  
Gulf Coastal Plain
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