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Controversial impact crater under Greenland’s ice is surprisingly ancient New date of 58 million years undercuts idea that strike triggered recent 1000-year plunge in temperatures By Paul Voose, Science News, March, 9, 2022 Giant impact crater in Greenland occurred a few million years after dinosaurs went extinct by University of Copenhagen, PhysOrg Wikipedia article discussing Hiawatha impact structure The open access paper is: Kenny, G. G., and others, 2022, A Late Paleocene age for Greenland’s Hiawatha impact structure. Science Advances. vol. 8, no. 10 Yours, Paul H.

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.

Mystery of Libyan desert glass solved at last. Famous since the time of King Tut the origin of the scattered glass fragments has long puzzled researchers. Aaron Cavosie from Australia’s Curtin University explains. https://cosmosmagazine.com/archaeology/mystery-of-libyan-desert-glass-solved-at-last Planetary scientists unravel mystery of Egyptian desert glass by Curtin University, PyhsOrg https://phys.org/news/2019-05-planetary-scientists-unravel-mystery-egyptian.html https://www.sciencealert.com/exotic-glass-in-egypt-was-created-by-a-meteorite-impact-millions-of-years-ago 100-Year Mystery Solved, Yellow Glass In Egyptian Desert Caused By Meteorite Strike, Athena Chan, Tech Times https://www.techtimes.com/articles/243406/20190518/100-year-mystery-solved-yellow-glass-in-egyptian-desert-caused-by-meteorite-strike.htm The paper is: Cavosie, A.J. and Koeberl, C., 2019. Overestimation of threat from 100 Mt–class airbursts? High-pressure evidence from zircon in Libyan Desert Glass. Geology. DOI: 10.1130/G45974.1 https://pubs.geoscienceworld.org/gsa/geology/article/570318/Overestimation-of-threat-from-100-Mtclass yours, Paul H.

Australians find extremely rare mineral in meteorite impact crater. Cecilia Jamasmie, Mining Com, October 16, 2018 http://www.mining.com/australians-find-extremely-rare-mineral-meteorite-impact-crater/ Ultra-rare mineral points to huge impact crater in Australia Michael Irving, New Atlas, October 17, 2018 https://newatlas.com/reidite-rarest-mineral-meteor-woodleigh-crater/56813/ the paper is: Cox, M.A., Cavosie, A.J., Bland, P.A., Miljković, K. and Wingate, M.T., 2018. Microstructural dynamics of central uplifts: Reidite offset by zircon twins at the Woodleigh impact structure, Australia. Geology, 46(11), pp.983-986. https://www.researchgate.net/publication/327938191_Microstructural_dynamics_of_central_uplifts_Reidite_offset_by_zircon_twins_at_the_Woodleigh_impact_structure_Australia https://www.researchgate.net/profile/Aaron_Cavosie https://pubs.geoscienceworld.org/gsa/geology/article-abstract/548639 Yours, Paul H.

"Lost continent" found under Mauritius, Wits University, January 31, 2017 - Lava-covered piece of continent is an ancient remnant, left over from the break-up of the supercontinent, Gondwana, which started about 200 million years ago. https://www.wits.ac.za/news/latest-news/research-news/2017/2017-01/lost-continent-found-under-mauritius.html Long-lost continent found submerged deep under Indian Ocean New Scientist-Jan 31, 2017 https://www.newscientist.com/article/2119963-long-lost-continent-found-submerged-deep-under-indian-ocean/ The paper is: Ashwal, L. D., M. Wiedenbeck, and T. H. Torsvik, 2017, Archaean zircons in Miocene oceanic hotspot rocks establish ancient continental crust beneath Mauritius. Nature Communications. vol. 8, Article number: 14086 (2017) doi:10.1038/ncomms14086 http://www.nature.com/articles/ncomms14086 Yours, Paul H.