potassium argon dating definition
potassium argon dating definitionpotassium-argon dating in British noun. a technique for determining the age of minerals based on the occurrence in natural potassium of a small fixed amount of radioisotope 40K that decays to the stable argon isotope 40Ar with a half-life of × years. The isotopes the KAr system relies on are Potassium (K) and Argon (Ar). Potassium, an alkali General assumptions for the Potassium-Argon dating system. Potassium–argon dating, abbreviated K–Ar dating, is a radiometric dating method used in geochronology and archaeology. It is based on measurement of the Decay series · Formula · Obtaining the data · Assumptions. geological dating that relies on the proportions of radioactive potassium in a rock sample and its decay product, argon.
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