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Eolian chronology reveals causal links between tectonics, climate, and erg generation

Author

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  • Shlomy Vainer

    (The Hebrew University of Jerusalem
    University of Lausanne
    Aix-Marseille Université, CNRS, Collège de France, IRD, INRA, CEREGE)

  • Ari Matmon

    (The Hebrew University of Jerusalem)

  • Yoav Ben Dor

    (Geological Survey of Israel, 32 Yesha’ayahu Leibowitz)

  • Eric P. Verrecchia

    (University of Lausanne)

  • Frank Eckardt

    (University of Cape Town)

Abstract

Evaluating the impact and implications of eolian repositories that mark large-scale climatic transitions requires knowledge about the timing of their emplacement and the mechanisms responsible for their production, which remain highly uncertain. Here we apply numerical modeling of cosmogenic nuclide data, measured in the largest continuous terrestrial body of sand on Earth, to determine settings under which the sand was generated, by constraining the timing of sand introduction into the interior of southern Africa. Our findings reveal that major events of sand formation and accumulation in the Kalahari Basin occurred between ~2.2 and 1 Myr ago. The establishment of the Kalahari sand field corresponds to regional, continental, and global scale morphotectonic and climatic changes that contributed to the mass production and widespread dispersion of sand. These changes substantially altered existing habitats, thus constituting a crucial milestone for flora, fauna, and hominins in southern Africa during the Pleistocene.

Suggested Citation

  • Shlomy Vainer & Ari Matmon & Yoav Ben Dor & Eric P. Verrecchia & Frank Eckardt, 2022. "Eolian chronology reveals causal links between tectonics, climate, and erg generation," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-33316-7
    DOI: 10.1038/s41467-022-33316-7
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    References listed on IDEAS

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    1. Darryl E. Granger & Ryan J. Gibbon & Kathleen Kuman & Ronald J. Clarke & Laurent Bruxelles & Marc W. Caffee, 2015. "New cosmogenic burial ages for Sterkfontein Member 2 Australopithecus and Member 5 Oldowan," Nature, Nature, vol. 522(7554), pages 85-88, June.
    2. Ana Christina Ravelo & Dyke H. Andreasen & Mitchell Lyle & Annette Olivarez Lyle & Michael W. Wara, 2004. "Regional climate shifts caused by gradual global cooling in the Pliocene epoch," Nature, Nature, vol. 429(6989), pages 263-267, May.
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