ANTHROP 2E03 Lecture Notes - Lecture 8: Fluorine, Taphonomy, Racemization
9 Apr 2018
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Taphonomy best for fossils (volcanic ash & sediment caves: geological, temporal the preservation conditions over time, biological the effect of other organisms after death. Hard elements of the body are preserved. Natural mummies occur when the soft tissue is also preserved (this is very rare) Replacement of organic remains by soil, minerals: fine minerals = fine details of the fossil picked up. Cast & mould sediments create a mould around the object, overtime when the object dissolves they are left with a mould they can make a 3-d cast out of. 2-d imprints in fine silt and clay w/ no mineral remains. Chronometric dating: radiometric (c-14) radioactive, will decay and break down, measure c-14 compared to c-12, half of c-14 takes 57 to 37 hundred years to break down (levels of c-14 can give an approx Volcanic k-ar, ar-ar allow for things older like 2 billion years vs c-14 57 hundred.
