By Gary (Ed.) Haynes, Gary Haynes
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.
Read or Download American Megafaunal Extinctions at the End of the Pleistocene (Vertebrate Paleobiology and Paleoanthropology) PDF
Similar paleontology books
This superbly illustrated textual content booklet, with cutting-edge illustrations, comes in handy not just for an advent to the topic, but in addition for the appliance of marine microfossils in paleoceanographic, paleoenvironmental and biostratigraphic analyses. the hot revival of curiosity in marine micropaleontology all over the world within the wake of the advance of series stratigraphic types has ended in the choice to reissue the quantity in its unique, yet paperback, shape.
Even supposing herbivory most likely first seemed over three hundred million years in the past, it in simple terms grew to become confirmed as a standard feeding technique in the course of overdue Permian instances. for that reason, herbivory advanced in different lineages of terrestrial vertebrates, and the purchase of this mode of feeding was once often linked to massive evolutionary diversification in these lineages.
Simply 12,000 years in the past - on the peak of the final Ice Age - saber-toothed tigers, immense flooring sloths, camels, hippos and the nice herds of proboscideans: monstrous mastodons and mammoths, extinct relations of the elephant, roamed the land the place skyscrapers now stand. Why are those best suited creatures not with us?
Extra resources for American Megafaunal Extinctions at the End of the Pleistocene (Vertebrate Paleobiology and Paleoanthropology)
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.
American Megafaunal Extinctions at the End of the Pleistocene (Vertebrate Paleobiology and Paleoanthropology) by Gary (Ed.) Haynes, Gary Haynes