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Definition of potassium-argon dating - 2 dictionary results

po⋅tas⋅si⋅um-ar⋅gon dat⋅ing

[puh-tas-ee-uhm-ahr-gon]
–noun Geology.
a method for estimating the age of a mineral or rock, based on measurement of the rate of decay of radioactive potassium into argon.

Origin:
1965–70
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Science Dictionary
potassium-argon dating  
A method of radiometric dating, involving analysis of the ratio of potassium 40 (a radioactive isotope of potassium) to argon (the product of radioactive decay of potassium 40) in a given sample.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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