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Rb-Sr whole rock and K-Ar mineral age determinations were made on rocks from the Broderick Falls (Webuye) area, western Kenya. Granitic rocks yielded a Rb-Sr whole rock isochron age of 2555 ± 101 Ma with an initial 87 Sr 86 Sr ratio of 0.70121 ± 0.00038. This age represents the time of granitoid emplacement. K-Ar mineral ages range from 574 to 3420 Ma, which is very variable...
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