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Any argon present in a mineral containing potassium-40 must have been formed as the result of radioactive decay. F, the fraction of K40 remaining, is equal to 

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Radiometric Dating

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Dating low-grade metamorphism and deformation of the Espinha├žo

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Investigations in A40/K40 dating - Goldich - 1957 - Eos

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Simply stated, radiometric dating is a set of methods for determining the age of a sample of So an atom of potassium-40 (K40), atomic number 19 emits a positron and .. A TRIP THROUGH TIME: Principles of Historical Geology, 2nd Ed.

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