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Potassium-Argon Dating Techniques. The(K-Ar that is potassium-argon isotopic dating method is very ideal for determining the chronilogical age of lavas. B.A., Earth Sciences, University of the latest Hampshire Developed within the 1950s, it absolutely was essential in developing the idea of dish tectonics plus in calibrating the geologic time scale. Potassium-Argon Tips Potassium does occur in 2 stable isotopes ( 41 K and 39 K) and another radioactive isotope ( 40 K). Potassium-40 decays with a half-life of 1250 million years, and thus 1 / 2 of the 40 K atoms have......

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