BIOLOGY 1M03 Chapter Notes - Chapter 13: Denisovan, Homo Ergaster, Homo Erectus
17 Sep 2013
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Part 3: the history of the human lineage. Anthropologists disagree strongly about how to classify middle pleistocene homins: Bio 1m03: maybe homins in africa and eurasia were one, single interbreeding population throughout the. Pleistocene: or maybe homins split into several new species as they migrated out of africa during the. Differences exist in the interpretation of recent human evolution. Remember, the concentration of 18o is higher in the oceans during periods wit cold climates. The pleistocene epoch started 1. 8 mya and involved a cooling trend that started in the miocene ~ 6 mya. Lower pleistocene is from 1,800,00 900,000 years ago. Middle pleistocene is from 900,000 130,000 years ago; began with massive glaciation. Bio 1m03: climate became colder and more variable; cold glacial periods punctuated by short, warner interglacial periods. Upper pleistocene is from 130,000 12,000 years ago and ended with warm interglacial phase. 12,000 present is an interglacial period called the holocene.
