lect april 20

lect april 20 - lectapril20 16:38 Beringia( Pleistoceneage...

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lect april 20 16:38 Music of the California Indian Beringia (prevailing theory about immigration) The way that people got to the americas Pleistocene age o During the age of earth history, 1 mill ago to 8000 bc o A lot of the earth was under ice Last ice age Wisconsin glaciation o Large sheet of ice in the north America, where Canada is o Significant because enough of the world ocean water was frozen including  the land of the Bering strait now under 170 feet of water o Included land of berinigia o Provided complete land bridge between Asia and America o First dates  50,000 BC, when they followed mammoths / Megafauna Either kayaked or walked o 65,000 bc – 8000 bc Bering strait o Land bridge that was able to be crossed when ocean waters were lower o Explains American population Megafauna
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o Big animals that preceded them were megafauna o Attracted to moss o What happened to the megafauna  Preserved perfectly in the brea tar pits o Became extinct after 12,000 BC Wooly Mammoths, mastodons, horses Overkill hyposthesis o Humans did it, they caused the extinction o Because the big game hunters in Eurasia were so good, the animals in  Americas could not resist and survive Preferable because they were large, and lived in large herds o Passed skills along to decedents o Big animals were not scared of the large animals Also had long gestation periods up to two years, pushed south so  quickly that they could not reproduce / adapt to different climate o Doubts of the overkill hyp There weren’t enough humans to wipe out all the species There solution, climate change, and the animals could not tolerate it Natural die-offs and extinction  Extra-terrestrials  o Geologists finding many bones,  o Believe a commit hit the earth’s atmosphere, broke apart o Huge biomass burn, animals could not find anything to eat
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Thus went extinct Desire to go southward was desire to hunt the animals
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This note was uploaded on 11/22/2010 for the course ENV S 3 taught by Professor Graves during the Spring '05 term at UCSB.

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lect april 20 - lectapril20 16:38 Beringia( Pleistoceneage...

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