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Article
Nature 221, 628 - 632 (15 February 1969); doi:10.1038/221628a0

Miocene Stratigraphy and Age Determinations, Rusinga Island, Kenya

J. A. VAN COUVERING & J. A. MILLER

Department of Geology, University of Cambridge
Department of Geodesy and Geophysics, University of Cambridge

Potassium–argon dating of the lavas of Rusinga Island, and a re-investigation of the associated sediments, indicate that most of the vertebrate fossils and nearly all of the early hominoids have come from strata about 18 million years old.

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