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Fission-track dating of pumice from the KBS Tuff, East Rudolf, Kenya

September 28, 2010

Fission-track dating of zircon separated from two pumice samples from the KBS Tuff in the Koobi Fora Formation, in Area 131, East Rudolf, Kenya, gives an age of 2.44±0.08 Myr for the eruption of the pumice. This result is compatible with the previously published K–Ar and 40Ar/39Ar age spectrum estimate of 2.61±0.26 Myr for the KBS Tuff in Area 105, but differs from the more recently published K–Ar date of 1.82±0.04 Myr for the KBS Tuff in Area 131. This study does not support the suggestion that pumice cobbles of different ages occur in the KBS Tuff

Citation Information

Publication Year 1976
Title Fission-track dating of pumice from the KBS Tuff, East Rudolf, Kenya
DOI 10.1038/263738a0
Authors A.J. Hurford, A.J.W. Gleadow, C. W. Naeser
Publication Type Article
Publication Subtype Journal Article
Series Title Nature
Series Number
Index ID 70001091
Record Source USGS Publications Warehouse
USGS Organization