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Potassium-Argon Dating Practices. The(K-Ar that is potassium-argon isotopic dating method is particularly ideal for determining the chronilogical age of lavas.

Potassium-Argon Dating Practices. The(K-Ar that is potassium-argon isotopic dating method is particularly ideal for determining the chronilogical age of lavas.

  • B.A., World Sciences, University of the latest Hampshire

Developed into the 1950s, it absolutely was crucial in developing the idea of dish tectonics plus in calibrating the geologic time scale.

Potassium-Argon Essentials

Potassium does occur in 2 stable isotopes ( 41 K and 39 K) plus one radioactive isotope ( 40 K). Potassium-40 decays having a half-life of 1250 million years, and thus 50 % of the 40 K atoms have died from then on period of the time. Its decay yields argon-40 and calcium-40 in a ratio of 11 to 89. The K-Ar method works by counting these radiogenic 40 Ar atoms caught inside minerals.