The potassiumargon dating method has been used to measure a wide variety of ages the potassiumargon age of some meteorites is as old as 4500000000 years and volcanic rocks as young as 20000 years old have been measured by this method.
Potassiumargon dating potassiumargon 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 potassium40 k40 decays to the gas argon as argon40 ar40.
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Argonargon or 40 ar 39 ar dating is a radiometric dating method invented to supersede potassiumargon kar dating in accuracy the older method required splitting samples into two for separate potassium and argon measurements while the newer method requires only one rock fragment or mineral grain and uses a single measurement of argon isotopes.
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potassiumargon dating potassiumargon dating has the advantage that the argon is an inert gas that does not react chemically and would not be expected to be.
Span classnews_dt10062016spannbsp018332potassium argon dating is another alternative that could be used radioactive potassium decays to an isotope of argon argon is a gas like nitrogen so it could be lost from the sample so we can only use potassium.
How potassiumargon dating works published 24 june 2008 gmt10 photo wikipedia by tas walker one of the most widely used dating methods is the potassiumargon.
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