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So, Zinj was the earliest but I think one of the most important things that the work at Olduvai provided, and it didn't provide it in '59 but a year later, was its context involved the possibility of dating through potassium-argon and later argon-argon radiometric dating and for the first time the very considerable antiquity of early hominids was established.
The new fossils were dated by the argon-argon radioisotopic method at the Berkeley Geochronology Center.
Though understood for over a third of a century, groups critical of dating methods seldom discuss the argon-argon method.
However, scientists in the mid-1960s came up with a way around this problem-the argon-argon method.
The argon-argon method can determine if a system has been disturbed.
In nearly all dating methods (except potassium-argon and argon-argon), some amount of the daughter product already exists in rocks when they cool.
An improvement in dating techniques with argon-argon allows us to plac
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