Download PDF by Gary (Ed.) Haynes, Gary Haynes: American Megafaunal Extinctions at the End of the

By Gary (Ed.) Haynes, Gary Haynes

ISBN-10: 1402087926

ISBN-13: 9781402087929

ISBN-10: 1402087934

ISBN-13: 9781402087936

The quantity includes summaries of proof, theories, and unsolved difficulties bearing on the unexplained extinction of dozens of genera of in general huge terrestrial mammals, which happened ca. 13,000 calendar years in the past in North the United States and approximately 1,000 years later in South the US. one other both mysterious wave of extinctions affected huge Caribbean islands round 5,000 years in the past. The coupling of those extinctions with the earliest visual appeal of humans has ended in the advice that foraging people are accountable, even though significant climatic shifts have been additionally happening within the Americas in the course of the various extinctions. The final released quantity with related (but now not exact) issues -- Extinctions in close to Time -- seemed in 1999; on the grounds that then loads of leading edge, interesting new learn has been performed yet has no longer but been compiled and summarized. various chapters during this quantity supply in-depth resum?s of the chronology of the extinctions in North and South the US, the potential insights into animal ecology supplied via experiences of good isotopes and anatomical/physiological features equivalent to progress increments in sizeable and mastodont tusks, the clues from taphonomic learn approximately large-mammal biology, the purposes of relationship the right way to the extinctions debate, and archeological controversies bearing on human looking of enormous mammals.

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Extra resources for American Megafaunal Extinctions at the End of the Pleistocene (Vertebrate Paleobiology and Paleoanthropology)

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1998). Dates for the uppermost dung balls include: 10,200 ± 300, 10,285 ± 240, 10,610 ± 32 210, 10,900 ± 185, 10,950 ± 60 BP. An anomalously late date, 9,560 ± 60 BP, was obtained for dermal ossicles from a museum collection; these may have been contaminated by preservative, although the date cannot be rejected out of hand, given the ca. 9,500 BP dates for Brazilian sloths. Immediately above the dung layer are charcoal deposits interpreted as human-created hearths, although few if any artifacts were associated with them.

It is not surprising that he interprets the new radiocarbon dates in this framework. Guthrie’s dates indicate that Alaskan horses decreased in size through the Late Glacial, and possibly went extinct ca. 12,500 BP (12,482 ± 80 BP is the latest date). Mammoths seem to have died out later (Guthrie, 2006) (the last date is 11,500 ± 160 BP). Ostensible mammoth tracks are dated to ca. 11,600 BP, and ivory used by humans at the Broken Mammoth site was dated to 11,540 ± 140 BP – one of the very few indications of human-mammoth co-existence in eastern Beringia.

Note 1. ” Calibrated ages (using calendar years, counting back from 1950 AD/CE) are stated as cal bp. References Adovasio JM, Pedler D, Donahue J, Stuckenrath R (1999) No vestige of a beginning nor prospect for an end: Two decades of debate on Meadowcroft Rockshelter. In: Bonnichsen R, Turnmire KL (eds) Ice Age peoples of North America: Environments, origins, and adaptations of the First Americans. Oregon State University Press, Corvallis, pp 416–431 Agenbroad LD (1984) New World mammoth distribution.

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American Megafaunal Extinctions at the End of the Pleistocene (Vertebrate Paleobiology and Paleoanthropology) by Gary (Ed.) Haynes, Gary Haynes

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