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Synchronous extinction of North America's Pleistocene mammals
Abstract
The late Pleistocene witnessed the extinction of 35 genera of North American mammals. The last appearance dates of 16 of these genera securely fall between 12,000 and 10,000 radiocarbon years ago (≈13,800–11,400 calendar years B.P.), although whether the absence of fossil occurrences for the remaining 19 genera from this time interval is the result of sampling error or temporally staggered extinctions is unclear. Analysis of the chronology of extinctions suggests that sampling error can explain the absence of terminal Pleistocene last appearance dates for the remaining 19 genera. The extinction chronology of North American Pleistocene mammals therefore can be characterized as a synchronous event that took place 12,000–10,000 radiocarbon years B.P. Results favor an extinction mechanism that is capable of wiping out up to 35 genera across a continent in a geologic instant.
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The disappearance of Sporormiella at ~12,600 cal yr B.P. indicates that the extinction of the megaherbivores in Florida and the American Southeast was synchronous with extinctions elsewhere in North America.
“The disappearance of Sporormiella at ~12,600 cal yr B.P. indicates that the extinction of the megaherbivores in Florida and the American Southeast was synchronous with extinctions elsewhere in North America (22, 26, 28).”
From Pre-Clovis occupation 14,550 years ago at the Page-Ladson site, Florida, and the peopling of the Americas (2016) · cites this paper as [26]
The Discussion describes North American late Pleistocene extinctions as consistent with a synchronous event, and the biogeographic simulation accounts for taxa found in the Southeast. The paper does not link that conclusion to a disappearance of Sporormiella at ~12,600 cal yr B.P. or establish that date for Florida and the American Southeast. (LLM, conf=0.87)
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Metadata
- Authors
- Faith, J. T., & Surovell, T. A.
- Affiliations
- Hominid Paleobiology Doctoral Program, Center for the Advanced Study of Human Paleobiology, Department of Anthropology, The George Washington University, 2110 G Street NW, Washington, DC 20052; and
- Department of Anthropology, University of Wyoming, P.O. Box 3431, 1000 East University Avenue, Laramie, WY 82071
- Venue
- Proceedings of the National Academy of Sciences
- Publisher
- National Academy of Sciences
- Published
- 2009-12-08
- Volume
- 106
- Issue
- 49
- Pages
- 20641-20645
- ISSN
- 0027-8424
- 1091-6490
- Cited by
- 122
- References
- 0
- Language
- en
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