Potassium argon dating error How accurate are Carbon-14 and other radioactive dating methods?

Potassium argon dating error

We also need to know that no parent or daughter has entered or left the system in the meantime.

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To date a rock one must know the original amount of the parent element. So data are again selected according to what the researcher already believes about the age of the rock.

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None of these experiments has detected any significant deviation for any isotope used in geologic dating [ Dalrymplepg. If they contained a hundred times more excess argon, their K-Ar ages would be a hundred times greater, I suppose.

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