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Potassium-argon Dating

see synonyms of potassium-argon dating

Noun

1. potassium-argon dating

geological dating that relies on the proportions of radioactive potassium in a rock sample and its decay product, argon

WordNet Lexical Database for English. Princeton University. 2010.

Potassium-argon Dating

see synonyms of potassium-argon dating
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 1.28 × 109 years. Measurement of the ratio of these isotopes thus gives the age of the mineral
Compare radiocarbon dating, rubidium-strontium dating

Collins English Dictionary. Copyright © HarperCollins Publishers

Potassium-argon Dating

see synonyms of potassium-argon dating
an indirect method of dating fossils, esp. those in very ancient volcanic rock, by using potassic minerals in the same strata as a reference: a natural radioactive isotope of potassium, K-40, decays steadily into argon, which accumulates in the minerals and is measured to determine age

Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by Houghton Mifflin Harcourt. All rights reserved.

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