Potassium-argon (k-ar) dating can date materials

Potassium-Argon Dating Potassium-Argon dating is the only viable technique for dating very old archaeological materials. Geologists have used this method to date rocks as much as 4 billion years old. It is based on the fact that some of the radioactive isotope of Potassium, Potassium K ,decays to the gas Argon as Argon Ar By comparing the proportion of K to Ar in a sample of volcanic rock, and knowing the decay rate of K, the date that the rock formed can be determined.

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, Ar will again accumulate, along with the entrained argon atoms, trapped. Chronological Methods 9 - Potassium-Argon Dating dating is the only viable technique for dating very old archaeological materials. of Potassium, Potassium (K),decays to the gas Argon as Argon (Ar). and knowing the decay rate of K, the date that the rock formed can be determined.

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