potassium-argon dating(redirected from K-Ar dating)
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Related to K-Ar dating: Potassium argon dating
potassium-argon datingthe determination of the age of minerals or rock strata based on comparison of the measurement of radiogenic argon-40 with that of potassium-40 and the known relative decay rates.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005