po•tas'si•um-ar'gon dat"ing

Pronunciation: (pu-tas'ē-um-är"gon), [key] Geol.
a method for estimating the age of a mineral or rock, based on measurement of the rate of decay of radioactive potassium into argon.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

potassium antimonatepotassium bicarbonate
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