K–Ar dating, or potassium-argon dating, is a radiometric dating technique used to determine the age of rocks and minerals based on the radioactive decay of potassium-40 (K-40) to argon-40 (Ar-40). Potassium-40 is a naturally occurring isotope of potassium that decays over time into argon, which is a gas.
K-Ar dating by Ciro Santilli 37 Created 2024-07-04 Updated 2025-07-16

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