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Fission track age of the KBS Tuff and associated hominid remains in northern Kenya

Abstract

Fission track ages of pumice from the KBS Tuff have been redetermined using carefully controlled etching and counting procedures. Primary igneous zircons from five pumice samples give a mean age of 1.87 ± 0.04 Myr. The presence of detrital minerals of two different age groups has important implications for the controversy over the age of this tuff.

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