Potassium argon dating is useful for determining the age of


13-Feb-2021 16:16

This well known method was the first technique that became available for accurate dating of old materials.

potassium argon dating is useful for determining the age of-22

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These grains absorb radiation over time from the surrounding sediments and the radiation (electrons) remain trapped within the mineral grain structure.This applies the geological principle that under normal circumstances younger layers of sediment will be deposited on top of older layers.This 'law of superimposition' works in the well-defined layers of the Willandra lunettes, but only dates objects as younger or older than adjacent layers.It has been used at Willandra to date the layers above and below the location of Mungo Lady and Mungo Man , and the layers above and below the footprints horizon.

Dates above and below a location provide minimum and maximum age determinations according to the law of superimposition.This isotope, after its half-life, decays into argon gas (Ar-40).



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