[meteorite-list] Mysterious patches of glassy rock across Atacama DesertIn Mysterious patches of glassy rock across Atacama Desert, https://www.mail-archive.com/meteorite-list at meteoritecentral.com/msg131785.html Robert Verish asked: >This story caused a big splash on the Internet back in late-2021, >but I'm still looking for a published paper. >Has anyone heard anything more about this speculated comet impact? > >Here is a follow-up article (dated Nov. 8, 2021) regarding a reported finding >of impact-melt glass from a suspect "comet impact in the Atacama Desert". > https://www.sci.news/space/atacama-desert-comet-10247.html > >Here is the original CNN article: > https://www.cnn.com/2021/11/03/world/atacama-desert-glass-comet-scn/index.html Below are some papers: Gattacceca, J., Devouard, B., Barrat, J.A., Rochette, P., Balestrieri, M.L., Bigazzi, G., M?nard, G., Moustard, F., Dos Santos, E., Scorzelli, R. and Valenzuela, M., 2021. A 650 km2 Miocene strewnfield of splash-form impact glasses in the Atacama Desert, Chile. Earth and Planetary Science Letters, 569, p.117049 Koeberl, C., Cr?sta, A.P. and Schulz, T., 2022, March. Geochemistry, Highly Siderophile Elements, and Re-Os Isotope Signatures of Impact Glasses from the Atacama Desert, Chile. In 53rd Lunar and Planetary Science Conference (Vol. 2678, p. 2616). https://www.hou.usra.edu/meetings/lpsc2022/pdf/2616.pdf Roperch, P., Gattacceca, J., Valenzuela, M., Devouard, B., Lorand, J.P., Arriagada, C., Rochette, P., Latorre, C. and Beck, P., 2017. Surface vitrification caused by natural fires in Late Pleistocene wetlands of the Atacama Desert. Earth and Planetary Science Letters, 469, pp.15-26. https://hal.science/hal-02889687/file/Pica_Glass_Paleomag_data.pdf Schultz, P.H., Harris, R.S., Perroud, S., Blanco, N. and Tomlinson, A.J., 2022. Widespread glasses generated by cometary fireballs during the late Pleistocene in the Atacama Desert, Chile. Geology, 50(2), pp.205-209. open access https://pubs.geoscienceworld.org/gsa/geology/article/50/2/205/609354/Widespread-glasses-generated-by-cometary-fireballs Yours, Paul H. |
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