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Body of laws Biology History of life on Ground Radiometric dating. Chronometric revolution. Potassium-argon K-Ar dating. K-Ar dating calculation. Atomic slew, atomic mass, furthermore isotopes.
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- Potassium–argon dating, abbreviated K–Ar dating, is a radiometric dating method used in...
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- The K-Ar dating technique was one of the earliest isotope...
K ar dating definitions Potassium—argon dating , abbreviated K—Ar dating , is a radiometric dating method used in geochronology and archaeology. It is based on measurement of the product of the radioactive decay of an isotope of potassium K into argon Ar. Potassium is a common element found in many materials, such as micas , clay minerals , tephra , and evaporites. In these materials, the decay product 40 Ar is able to escape the liquid molten rock, but starts to accumulate when the rock solidifies recrystallizes. The amount of argon sublimation that occurs is a function of the purity of the sample, the composition of the mother material, and a number of other factors. Time since recrystallization is calculated by measuring the ratio of the amount of 40 Ar accumulated to the amount of 40 K remaining.
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