K-Ar ages of miocene hominoidea (Kenyapithecus and Samburupithecus) from Samburu Hills, Northern Kenya

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The Neogene volcano-sedimentary succession west of Baragoi and in the Samburu Hills, northern Kenya has yielded over 200 higher primate fossils, comprising the cercopithecoid Victoriapithecus and the hominoids, Nyanzapithecus, Kenyapithecus and Samburupithecus. K-Ar ages have been obtained from lavas and pumices intercalated with the sediments. The Aka Aiteputh Formation with Kenyapithecus and Nyanzapithecus is dated ca 15-14 Ma while the Namurungule Formation with Samburupithecus is ca 9.5 Ma.

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