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potassium-argon dating definition

potassium-argon dating (-är′gän′)

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 Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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"potassium-argon dating." Webster's New World College Dictionary. 2009

  • Your Dictionary. 5 July 2009
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potassium-argon dating. (2009). In Webster's New World College Dictionary

  • Retrieved July 5th, 2009, from www.yourdictionary.com/potassium-argon-dating

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