Anthropology 100 Lecture Notes 4

Anthropology 100 Lecture Notes 4 - Haylee Davis...

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Unformatted text preview: Haylee Davis Anthropology 100 Lecture Notes #4 Miocene *Apes first evolved during Miocene-have lack of tail (differentiated from other mammals)-Apes outnumbered monkeys, ape evolution took off-8 mya-5mya (emergence of hominins) end of Miocene-East Africa-sites in Rift Valley, where two of the earths tectonic plates have been moving apart for 20 million years-all sites occur within the rift valley (volcanic activity, eroding) covering up fossil sites-open air sites-oldest sediments on bottom, newest on top-record is much older in East Africa-much more reliable dates (absolute dates)-South Africa-sites preserved in underground dolomitic caves-underground cave sites-ending up in caves by accident, did not live there-record is more recent-less reliable dates *Hominins were not limited to these areas (reasons we dont have fossilts in other parts is that there were bad preservation environments)-east and central -they could have lived there-depositional contact-Earliest hominin fossils come from East Africa, including Ardipithecus (from Ethiopia), Orrorin (from Kenya), and Sahelanthropus (from Chad)-5-7 mya (links Humans and Chimpanzees) lineage, common ancestor-all being similarly adapted 1. Earliest hominins we know of1....
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This note was uploaded on 03/24/2012 for the course ANT 100 taught by Professor Bowie during the Fall '11 term at Wisconsin.

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Anthropology 100 Lecture Notes 4 - Haylee Davis...

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