‘In conventional interpretation of K/Ar (potassium/argon) age data, it is common to discard ages which are substantially too high or too low compared with the rest of the group or with other available data such as the geological time scale. The discrepancies between the rejected and the accepted are arbitrarily attributed to excess or loss of argon.

A Hayatsu, K-Ar isochron age of the North Mountain Basalt, Nova Scotia’. Canadian Journal of Earth Sciences, vol.16, 1979, p.974.

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