Faunal age of the Usno, Shungura B and Hadar Formations, Ethiopia

Abstract

Recent work by Brown1, correlating the Sidi Hakoma (or Sidiha Koma2) Tuff at Hadar with Tuffs B and U-10 of the Shungura and Usno Formations, respectively, reverses a recent finding3 indicating an age of the Hadar Formation fauna of 2.9 to greater than 3.6 Myr BP. The difference in these determinations is 0.4 Myr, a significant period of evolutionary time. We compare the faunas from Shungura Unit B10, Usno and Hadar and discuss the implications for interpretation of the early hominid fossil record.

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Boaz, N., Howell, F. & McCrossin, M. Faunal age of the Usno, Shungura B and Hadar Formations, Ethiopia. Nature 300, 633–635 (1982). https://doi.org/10.1038/300633a0

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