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User:Awc/K-Ar applied to young rocks

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K-Ar applied to young rocks

This is great:

It uses potassium-argon (more precisely, argon-argon) dating to calculate the famous eruption of Vesuvius in 79 A.D. (1918 years ago) to have occurred 1925 ± 94 years ago. This establishes a direct connection betweeen historical dates and a method applicable to the earliest rocks. There is a related news release from UC Berkeley:

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