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  • Age of the oldest known Homo sapiens from eastern Africa

    From Pandora@21:1/5 to All on Thu Jan 13 12:41:06 2022
    Age of the oldest known Homo sapiens from eastern Africa

    Abstract

    Efforts to date the oldest modern human fossils in eastern Africa,
    from Omo-Kibish and Herto in Ethiopia, have drawn on a variety of
    chronometric evidence, including 40Ar/39Ar ages of stratigraphically
    associated tuffs. The ages that are generally reported for these
    fossils are around 197 thousand years (kyr) for the Kibish Omo and
    around 160–155 kyr for the Herto hominins. However, the stratigraphic relationships and tephra correlations that underpin these estimates
    have been challenged. Here we report geochemical analyses that link
    the Kamoya’s Hominid Site (KHS) Tuff, which conclusively overlies the
    member of the Omo-Kibish Formation that contains Omo I, with a major
    explosive eruption of Shala volcano in the Main Ethiopian Rift. By
    dating the proximal deposits of this eruption, we obtain a new minimum
    age for the Omo fossils of 233 +/- 22 kyr. Contrary to previous
    arguments we also show that the KHS Tuff does not correlate with
    another widespread tephra layer, the Waidedo Vitric Tuff, and
    therefore cannot anchor a minimum age for the Herto fossils. Shifting
    the age of the oldest known Homo sapiens fossils in eastern Africa to
    before around 200 thousand years ago is consistent with independent
    evidence for greater antiquity of the modern human lineage.

    Open access:
    https://www.nature.com/articles/s41586-021-04275-8

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  • From DD'eDeN aka note/nickname/alas_my_l@21:1/5 to Pandora on Thu Jan 13 08:22:36 2022
    On Thursday, January 13, 2022 at 6:41:09 AM UTC-5, Pandora wrote:
    Age of the oldest known Homo sapiens from eastern Africa

    Abstract

    Efforts to date the oldest modern human fossils in eastern Africa,
    from Omo-Kibish and Herto in Ethiopia, have drawn on a variety of chronometric evidence, including 40Ar/39Ar ages of stratigraphically associated tuffs. The ages that are generally reported for these
    fossils are around 197 thousand years (kyr) for the Kibish Omo and
    around 160–155 kyr for the Herto hominins. However, the stratigraphic relationships and tephra correlations that underpin these estimates
    have been challenged. Here we report geochemical analyses that link
    the Kamoya’s Hominid Site (KHS) Tuff, which conclusively overlies the member of the Omo-Kibish Formation that contains Omo I, with a major explosive eruption of Shala volcano in the Main Ethiopian Rift. By
    dating the proximal deposits of this eruption, we obtain a new minimum
    age for the Omo fossils of 233 +/- 22 kyr. Contrary to previous
    arguments we also show that the KHS Tuff does not correlate with
    another widespread tephra layer, the Waidedo Vitric Tuff, and
    therefore cannot anchor a minimum age for the Herto fossils. Shifting
    the age of the oldest known Homo sapiens fossils in eastern Africa to
    before around 200 thousand years ago is consistent with independent
    evidence for greater antiquity of the modern human lineage.

    Open access:
    https://www.nature.com/articles/s41586-021-04275-8


    Same age as the oldest hearth: 230ka Israel cave iirc.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From DD'eDeN aka note/nickname/alas_my_l@21:1/5 to All on Thu Jan 13 08:30:24 2022
    On Thursday, January 13, 2022 at 11:22:37 AM UTC-5, DD'eDeN aka note/nickname/alas_my_loves wrote:
    On Thursday, January 13, 2022 at 6:41:09 AM UTC-5, Pandora wrote:
    Age of the oldest known Homo sapiens from eastern Africa

    Abstract

    Efforts to date the oldest modern human fossils in eastern Africa,
    from Omo-Kibish and Herto in Ethiopia, have drawn on a variety of chronometric evidence, including 40Ar/39Ar ages of stratigraphically associated tuffs. The ages that are generally reported for these
    fossils are around 197 thousand years (kyr) for the Kibish Omo and
    around 160–155 kyr for the Herto hominins. However, the stratigraphic relationships and tephra correlations that underpin these estimates
    have been challenged. Here we report geochemical analyses that link
    the Kamoya’s Hominid Site (KHS) Tuff, which conclusively overlies the member of the Omo-Kibish Formation that contains Omo I, with a major explosive eruption of Shala volcano in the Main Ethiopian Rift. By
    dating the proximal deposits of this eruption, we obtain a new minimum
    age for the Omo fossils of 233 +/- 22 kyr. Contrary to previous
    arguments we also show that the KHS Tuff does not correlate with
    another widespread tephra layer, the Waidedo Vitric Tuff, and
    therefore cannot anchor a minimum age for the Herto fossils. Shifting
    the age of the oldest known Homo sapiens fossils in eastern Africa to before around 200 thousand years ago is consistent with independent evidence for greater antiquity of the modern human lineage.

    Open access:
    https://www.nature.com/articles/s41586-021-04275-8
    Same age as the oldest hearth: 230ka Israel cave iirc.
    Oops, wrong, 300ka Qesem Cave Israel.
    Though burnt stone tools and seeds might indicate 790ka cave hearths, again in Israel, per 2004 article.
    https://www.scientificamerican.com/podcast/episode/300kya-hearth/#:~:text=Now%2C%20archaeologists%20report%20the%20discovery,of%20Qesem%20Cave%20in%20Israel.
    https://historyofinformation.com/detail.php?id=2574

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