potassium argon dating

potassium argon dating: a chronometric dating technique based on the rate of decay of potassium 40 to argon 40. Used to date rocks up to thousands of millions of years old though it is restricted to volcanic material no more recent than c 100 000 years old. One of the most widely used methods in the dating of early hominid sites in Africa.

Source: Anthromorphemics

 

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