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Age Determinations on Feldspar from the Lower Omo Basin

Nature volume 222, page 1143 (21 June 1969) | Download Citation

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Abstract

Total degassing 40Ar/39Ar age determinations have been made on a concentrate of fresh feldspar from lapilli in a pumice–lapilli-tuff of the Nkalabong Fm., Lower Omo Basin, Ethiopia.

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References

  1. 1.

    , Geochim. Cosmochim. Acta, 32, 781 (1968).

  2. 2.

    , , , , and , Proc. Roy. Soc. A, 307, 251 (1968).

  3. 3.

    , , and , Data for Orogenic Studies, 1 (edit. by Spencer, A.) (Geological Society, London, 1969, in the press).

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Affiliations

  1. Birkbeck College, University of London

    • F. J. FITCH
  2. Department of Geodesy and Geophysics, University of Cambridge

    • J. A. MILLER

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DOI

https://doi.org/10.1038/2221143a0

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