40Ar/39Ar age spectra from the KBS Tuff, Koobi Fora Formation
- 1 November 1981
- journal article
- Published by Springer Nature in Nature
- Vol. 294 (5837) , 120-124
- https://doi.org/10.1038/294120a0
Abstract
40Ar/39Ar age spectra on anorthoclase phenocrysts from three pumice clasts in the KBS Tuff yield nearly ideal flat patterns, providing good evidence that the samples have remained undisturbed since crystallization. The ages are concordant at 1.88±0.02 Myr, and confirm that the KBS Tuff, a key marker bed in the Koobi Fora Formation, northern Kenya, is now very well dated. These results resolve the conflict between earlier 40Ar/39Ar and conventional K-Ar dating measurements on the KBS Tuff.Keywords
This publication has 25 references indexed in Scilit:
- Tempo and mode in hominid evolutionNature, 1981
- K–Ar age estimate for the KBS Tuff, East Turkana, KenyaNature, 1980
- Fission track age of the KBS Tuff and associated hominid remains in northern KenyaNature, 1980
- 40Ar/39Ar dating of the KBS Tuff in Koobi Fora Formation, East Rudolf, KenyaNature, 1976
- Age of KBS Tuff in Koobi Fora Formation, East Rudolf, KenyaNature, 1975
- Total fusion40Ar/39Ar ages using Hifar reactorJournal of the Geological Society of Australia, 1974
- New Hominid Remains and Early Artefacts from Northern Kenya: Preliminary Geological Interpretation of a New Hominid Site in the Lake Rudolf BasinNature, 1970
- New Hominid Remains and Early artefacts from Northern Kenya: Early Artefacts from the Koobi Fora AreaNature, 1970
- New Hominid Remains and Early Artefacts from Northern Kenya: Fauna and Artefacts from a New Plio-Pleistocene Locality near Lake Rudolf in KenyaNature, 1970
- Potassium-argon dating by activation with fast neutronsJournal of Geophysical Research, 1966