ANTHR-130 Lecture Notes - Lecture 24: Zooarchaeology, Caucasian Race, Pearl Millet
24 Aug 2020
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Based on bones fossilizing in the ground for the same length of time absorb the same proportion of fluorine from the local ground water. It is a radiometric technique since it measures radioactive decay. The absorption of c-14 stops upon death. C-14 breaks down into nitrogen since is is unstable. By measuring the proportion of c-14 int eh organic material, the date of death can. The date is then correlated to calendar years. Since the half life is relatives short, it is only used on items less then 40,000 years be determines old. Another radiometric technique k-40 is a radioactive isotope of potassium that. Can be used on really old fossils because halflife is 1. 3 billion years. Cannot be used with materials less than 500,000 years old. Uranium series dating: measures fission tracks produces during the decay of. Electron sprin resonance: measures electrons that are constantly trapped in rocks.
