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Potassium-Argon Dating Methods
Potassium–argon dating, abbreviated K–Ar dating, is a radiometric dating method used in means radiogenic argon; ^ McDougall & Harrison, pp. Potassium-argon dating definition: a technique for determining the age of minerals based on the occurrence in natural, Meaning, pronunciation, translations. Definition of potassium–argon dating, a method of dating rocks from the relative proportions of radioactive potassium and its decay product, argon
Unless tied to historical records, dating by archaeological methods can only be relative - such as stratigraphy, typology, cross-dating, and sequence dating. Absolute dating, with some reservation, is provided by dendrochronology, varve dating, thermoluminescence, potassium-argon dating, and, most important presently, radiocarbon dating.
Some relative dating can be calibrated by these or by historical methods to give a close approximation to absolute dates - archaeomagnetism, obsidian potassium argon dating def dating, and pollen analysis. Other methods include: coin dating, seriation, and amino-acid racemization. Though the method has been limited in its archaeological use so far, it has already proved a useful check method for potassium-argon dating for volcanic deposits at Olduvai Gorge, Tanzania, and obsidian, tephra beds, mineral inclusions in pottery, and some man-made glasses have also been dated.
Specifically, it is the dating of archaeological data in association with a geological deposit or formation, such as the dating of Pleistocene human remains in the context of glacial advances and retreats. The term is applied to all absolute and relative dating methods that involve the earth's physical changes, like radiocarbon dating, dendrochronology, archaeomagnetism, fluorine testing, obsidian dating, potassium-argon dating, thermoluminescence, and varve dating.
It is also defined as the time taken for half the quantity of a radioactive isotope in a sample to decay and form a stable element.
Potassium-argon Dating Dr. Michael Wilson, Geology Department, Douglas College "Potassium argon dating is another alternative that could be used.