ANTH 011 Lecture Notes - Lecture 15: Paleoecology, Biological Anthropology, Subfossil
22 Dec 2020
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No lemurs between eocene and time after that. Subfossil lemurs: old but not quite old enough to be a fossil (50,000 years old) Earliest are from the eocene of eastern egypt in the fayum. Sem microscope shows wear patterns in enamel that prove tooth comb. Info still being pursued but long evolutionary lineage. Origin of anthropoids: a hotly-debated in biological anthropology. The fayum: rich fossil site in egypt. Lower layers (late eocene) contain many different taxa that are likely to be early anthropoids. Absolute dating: identifying the precise date of an object. Relative dating: identifying the age of an object relative to another object. Good for rock that has been super heated. Stones contain trace amounts of radioactive elements (uranium or thorium) Heating releases displaced beta particles that glow. Good for tree remains <11,000 years old. Done using a template wood for a similar geographic region. Magnetic polarities within tectonic plates and volcano ash.
