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potassium-argon
A radiometric dating method based on the fact that potassium-40 in volcanic rock decays into argon-40 and calcium-40 at a known rate. The half-life of potassium-40 is approximately 1. 3 billion years. Chronometric dates are determined by measuring the amount of argon-40 in a sample. Similarly, argon-40 and argon-39 ratios can be used for chronometric dating.
- 词性: noun
- 行业/领域: 人类学
- 类别 体质人类学
- Company: Palomar College
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创建者
- Tegor
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