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the potassium- argon ( k- ar) isotopic dating method is especially useful for determining the age of lavas. developed in the 1950s, it was important in developing the theory of plate tectonics and in calibrating the geologic time scale.

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new adult dating sites. 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.

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