Which stable element is used to determine the age of volcanic rock?
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Answered by
32
Scientists use radiometric dating to measure the age of volcanic rocks. The radioactive decay rates of certain radioactive elements is a known and fixed quantity. For example, half of the potassium-40 found in a substance will naturally decay to argon-40 over 1.3 billion years.
Answered by
92
Answer is NOT potassium. Marked wrong on E2020
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