Loading ...
Sorry, an error occurred while loading the content.

Omo ?195 ka

Expand Messages
  • Marc Verhaegen
    Confirmation of a late middle Pleistocene age for the Omo Kibish 1 cranium by direct uranium-series dating Maxime Aubert, Alistair W.G. Pike, Chris Stringer,
    Message 1 of 1 , Nov 14, 2012
    • 0 Attachment
      Confirmation of a late middle Pleistocene age for the Omo Kibish 1 cranium
      by direct uranium-series dating
      Maxime Aubert, Alistair W.G. Pike, Chris Stringer, Antonis Bartsiokas, Les
      Kinsley, Stephen Eggins, Michael Day & Rainer Grün 2012 JHE

      While it is generally accepted that Hs evolved in Africa, the specific
      physical evidence for that origin remains disputed.
      The modern-looking Omo-1 skeleton, discovered in the Kibish region of
      Ethiopia in 1967, was controversially dated at ∼130 ka by U-series dating
      on associated Mollusca,
      in 2005, Ar–Ar dating on associated feldspar crystals in pumice clasts
      provided evidence for an even older age of ∼195 ka.
      ...
      Here we present direct U-series determinations on the Omo 1 cranium.
      In spite of significant methodological complications, which are discussed
      in detail, the results indicate that the human remains do not belong to a
      later intrusive burial and are the earliest representative of anatomically
      modern humans.
      Given the more archaic morphology shown by the apparently contemporaneous
      Omo 2 calvaria, we suggest that direct U-series dating is applied to this
      fossil as well, to confirm its age in relation to Omo 1.
    Your message has been successfully submitted and would be delivered to recipients shortly.