One important limitation when using potassium-argon for age-dating is that ________

A) potassium decays twice as fast as other isotopes
B) potassium can only age-date rocks younger than 70,000 years old
C) argon is a gas and may leak from minerals, throwing off measurements
D) argon is unstable at surface conditions and easily weathered from rocks


Answer: C

Environmental & Atmospheric Sciences

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