Earth's oldest asteroid strike linked to 'big thaw' Curtin University, January 22, 2020
https://www.sciencedaily.com/releases/2020/01/200122100546.htm the open access paper is: Timmons M. Erickson, Christopher L. Kirkland, Nicholas E. Timms, Aaron J. Cavosie, Thomas M. Davison. Precise radiometric age establishes Yarrabubba, Western Australia, as Earth’s oldest recognised meteorite impact structure. Nature Communications, 2020; 11 (1) DOI: 10.1038/s41467-019-13985-7 https://www.nature.com/articles/s41467-019-13985-7 Yours, Paul H.
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