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Showing results for tags 'extraterrestrial impact'.
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Strange yellow glass found in Libyan desert may have formed from lost meteor impact
Oxytropidoceras posted a topic in Geology
Libyan desert’s yellow glass: how we discovered the origin of these rare and mysterious shards, Elizaveta Kovaleva Lecturer, University of the Western Cape The Conversation, November 20, 2023 Strange yellow glass found in Libyan desert may have formed from lost meteor impact By Elizaveta Kovaleva Live Science, December 03, 2023 The paper is: Kovaleva, E., Helmy, H., Belkacim, S., Schreiber, A., Wilke, F.D. and Wirth, R., 2023. Libyan Desert Glass: New evidence for an extremely high-pressure-temperature impact event from nanostructural study. American Mineralogist, 108(10), pp.1906-1923. More PDFs of of Dr. Kovaleva's Publciations Yours, Paul H.- 2 replies
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- libyan desert
- egypt
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Open access paper supporting Bolaven Plateau, Laos, as location for source crater of Australasian strewn field
Oxytropidoceras posted a topic in Geology
Kerry Sieh, Dayana Schonwalder Angel, Jason Herrin, and Jia Yong Quah, 2023. Proximal ejecta of the Bolaven extraterrestrial impact, southern Laos Proceedings of the National Academy of Sciences. 120 (50) e2310351120 https://doi.org/10.1073/pnas.2310351120 Yours, Paul H.-
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- bolaven plateau
- laos
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A steeply-inclined trajectory for the Chicxulub impact
Oxytropidoceras posted a topic in Fossil News
Dinosaur-dooming asteroid struck Earth at 'deadliest possible' angle Imperial College London, May 26, 2020 https://www.sciencedaily.com/releases/2020/05/200526111320.htm Collins, G.S., Patel, N., Davison, T.M. et al. A steeply- inclined trajectory for the Chicxulub impact. Nat Commun 11, 1480 (2020). https://www.nature.com/articles/s41467-020-15269-x Another paper: Rae, A.S., Collins, G.S., Poelchau, M., Riller, U., Davison, T.M., Grieve, R.A., Osinski, G.R., Morgan, J.V. and Expedition, I.I., 2019. Stress‐Strain Evolution During Peak‐Ring Formation: A Case Study of the Chicxulub Impact Structure. Journal of Geophysical Research: Planets, 124(2), pp.396-417. https://eprints.gla.ac.uk/192907/1/192907.pdf https://hal.umontpellier.fr/hal-02128150/document Yours, Paul H.-
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- chicxulub
- extraterrestrial impact
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New Investigation of a Greenland ice core platinum anomaly near the Bølling-Allerød/Younger Dryas boundary
Oxytropidoceras posted a topic in Fossil News
Green, C. E., 2019. Investigating the origin of a Greenland ice core geochemical anomaly near the Bølling-Allerød/Younger Dryas boundary (Doctoral dissertation, Durham University). http://etheses.dur.ac.uk/13490/ http://etheses.dur.ac.uk/13490/1/C_Green_thesis_final_CORRECTIONS.pdf Green (2019) noted: "The source of a platinum peak identified in the Greenland Ice Sheet Project 2 (GISP2) ice core associated with high platinum/iridium (Pt/Ir) and platinum/aluminium (Pt/Al) ratios, and previous research attributed the anomaly to an unusual iron-rich Ir-poor meteorite impact." Green (2019) concluded: I. the Laacher See eruption is not the Pt spike source because: A. the Laacher See tephra has low Pt concentrations, B. the Laacher See tephra’s geochemical ratios are dissimilar to the GISP2 Pt spike and C. conversion of the Pt spike timing to the newest ice core age-depth model shows a chronological offset of ~60 years between the two events. II. The event resulting in the Pt spike occurred ~60 years after GS-1 cooling, and was therefore not the primary trigger. III. and the Pt spike origin is interpreted as either: A. a noncataclysmic impact of an undiscovered iron meteorite B. or an unidentified Pt-rich volcanic eruption contemporaneous with the anomaly, whose aerosol fractionated in the atmosphere or ice. Yours, Paul H.-
- platinum anomaly
- platinum spike
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Asteroids, Micro Diamonds, and the Younger Dryas with Jens Notroff: Archaeological Fantasies Ep 106 Archaeological Fantasies Podcast https://player.fm/series/archaeological-fantasies-podcast/asteroids-micro-diamonds-and-the-younger-dryas-with-jens-notroff-archaeological-fantasies-ep-106 https://player.fm/series/archaeological-fantasies-podcast The Deus ex machina for the destruction of civilizations, either imaginary or real, seems to be comet impacts. Remix – Atlantis in Sardinia with Dr. Emily Holt Archaeological Fantasies ep 107 https://player.fm/series/archaeological-fantasies-podcast/remix-atlantis-in-sardinia-with-dr-emily-holt-archaeological-fantasies-ep-107 https://player.fm/series/archaeological-fantasies-podcast Yours, Paul H.
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- younger dryas
- pleistocene
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