Search the Community
Showing results for tags 'asteroid impact'.
Found 4 results
Earth's oldest rock was found by Apollo 14 astronauts -- on the moon. Ashley Strickland, CNN, January 24, 2019 https://www.cnn.com/2019/01/24/world/earth-oldest-rock-moon/index.html We May Have Found Earth's Oldest Known Rock. It Was on The Moon. Michelle Starr, January 25, 2019 https://www.sciencealert.com/earth-s-oldest-rock-may-have-been-found-it-was-um-on-the-moon The paper is: J.J. Bellucci, A.A. Nemchin, M. Grange, K.L. Robinson, G. Collinse, M.J. Whitehouse, J.F. Snape, M.D.Norman D.A.Krin Terrestrial-like zircon in a clast from an Apollo 14 breccia Earth and Planetary Science Letters. Volume 510, Pages 173-185 https://www.sciencedirect.com/science/article/pii/S0012821X19300202 Yours, Paul H.
Isle of Skye Cretaceous-Paleocene Boundary Site Vandalized Meteorite hunters dig up 60 million-year-old site in Skye BBC News, 20 November 2018 https://www.bbc.com/news/uk-scotland-highlands-islands-46262827 Meteor strike site on Skye to be protected by security glass The Press and Journal, November 21, 2018 https://www.pressandjournal.co.uk/fp/news/islands/inner-hebrides/1613765/meteor-strike-site-on-skye-to-be-protected-by-security-glass/ Original news article: 60 million-year-old meteorite impact found on Skye BBC News, 14 December 2017 https://www.bbc.com/news/uk-scotland-highlands-islands-42351959 The paper is: Drake, S.M., Beard, A.D., Jones, A.P., Brown, D.J., Fortes, A.D., Millar, I.L., Carter, A., Baca, J. and Downes, H., 2017. Discovery of a meteoritic ejecta layer containing unmelted impactor fragments at the base of Paleocene lavas, Isle of Skye, Scotland. Geology, 46(2), pp.171-174. https://pubs.geoscienceworld.org/gsa/geology/article/46/2/171/525169 https://core.ac.uk/download/pdf/143474826.pdf https://www.researchgate.net/profile/Andrew_Beard https://www.researchgate.net/publication/321762044_Discovery_of_a_meteoritic_ejecta_layer_containing_unmelted_impactor_fragments_at_the_base_of_Paleocene_lavas_Isle_of_Skye_Scotland Yours, Paul H.
Kasia posted a topic in Fossil Newshttp://www.iflscience.com/plants-and-animals/this-weird-venomous-mammal-survived-the-asteroid-impact-that-wiped-out-the-dinosaurs/
Cavosie, A.J., N.E. Timms, T.M. Erickson, and C. Koeberl, 2017, New clues from Earth’s most elusive impact crater: Evidence of reidite in Australasian tektites from Thailand. Geology Published: December 20, 2017 DOI: https://doi.org/10.1130/G39711.1 https://pubs.geoscienceworld.org/gsa/geology/article-abstract/525531/new-clues-from-earth-s-most-elusive-impact-crater? " Here we report new evidence of a rare high-pressure phase in Australasian tektites that further constrains the location of the source crater. The former presence of reidite, a high-pressure polymorph of zircon, was detected in granular zircon grains within Muong Nong–type tektites from Thailand." "The data presented here place further constraints on the distribution of high-pressure phases in Australasian tektites, including coesite and now reidite, to an area centered over Southeast Asia, which appears to be the most likely location of the source crater." An impact capable of producing such a large strewn field certainly must have devastated prehistoric fauna and flora of Southeast Asia. I wonder if anyone has looked into this aspect of this asteroid impact. Yours, Paul H.