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 |