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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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- egypt
- extraterrestrial impact
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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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- australasian strewn field
- bolaven diamicton
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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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- asteroid impact
- chicxulub
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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.-
- bølling-allerød
- extraterrestrial impact
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Evaluation of Paleocene-Eocene thermal maximum impact trigger hypothesis
Oxytropidoceras posted a topic in Rocks & Minerals
Galinkin, R.A., 2019. Evaluating the impact trigger hypothesis for the onset of the Paleocene-Eocene thermal maximum (MS thesis, Rutgers University-School of Graduate Studies). https://rucore.libraries.rutgers.edu/rutgers-lib/60679/ https://rucore.libraries.rutgers.edu/rutgers-lib/60679/PDF/1/play/ Yours, Paul H. -
Martian Meteor Collision May Have Triggered a 1,000-Foot Tsunami
Oxytropidoceras posted a topic in Geology
Martian Meteor Collision May Have Triggered a 1,000-Foot Tsunami https://www.livescience.com/66088-mars-tsunami-ground-zero.html https://www.space.com/mars-ocean-mega-tsunami-impact-crater.html https://bgr.com/2019/08/05/mars-crater-tsunami-study-asteroid/ The paper is: Costard, F., Séjourné, A., Lagain, A., Ormö, J., Rodriguez, J.A.P., Clifford, S., Bouley, S., Kelfoun, K. and Lavigne, F., 2019. The Lomonosov Crater Impact Event: A possible Mega‐tsunami Source on Mars. Journal of Geophysical Research: Planets. https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019JE006008 Another paper is: Rodriguez, J.A.P., Fairén, A.G., Tanaka, K.L., Zarroca, M., Linares, R., Platz, T., Komatsu, G., Miyamoto, H., Kargel, J.S., Yan, J. and Gulick, V., 2016. Tsunami waves extensively resurfaced the shorelines of an early Martian ocean. Scientific reports, 6, p.25106. https://www.nature.com/articles/srep25106 http://cab.inta-csic.es/uploads/noticias/adjuntos/20160519151549.pdf http://www.cab.inta.es/uploads/noticias/adjuntos/20160519151549.pdf Yours, Paul H.-
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- extraterrestrial impact
- lomonosov crater
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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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The "Great Expectations Syndrome" and Mass Extinctions
Oxytropidoceras posted a topic in Fossil News
Below is an interesting paper about mass extinctions. Racki, G. 2012. The Alvarez impact theory of mass extinction; limits to its applicability and the "great expectations syndrome". Acta Palaeontologica Polonica 57 (4): 681-702. https://www.app.pan.pl/archive/published/app57/app20110058.pdf https://www.app.pan.pl/article/item/app20110058.html https://www.researchgate.net/publication/239739714_The_Alvarez_impact_theory_of_mass_extinction_limits_to_its_applicability_and_the_great_expectations_syndrome https://www.researchgate.net/profile/Grzegorz_Racki http://agro.icm.edu.pl/agro/element/bwmeta1.element.agro-d1182c96-9ae1-48af-858c-a2f844a3d830/c/app20110058_681.pdf Other papers are: Racki, G., 2015. Catastrophism and neocatastrophism versus cosmic hazard: Ager versus Alvarez; Cuvier versus Laplace. Palaios, 30(6), pp. 432-434. http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.894.7456&rep=rep1&type=pdf https://www.researchgate.net/publication/279238673_Catastrophism_and_neocatastrophism_versus_cosmic_hazard_Ager_versus_Alvarez_Cuvier_versus_Laplace Racki, G., 2014. Dmitri Sobolev and other forgotten forerunners of mass extinction science and volcanic catastrophism. Acta Palaeontologica Polonica, 59(4), pp. 1006-1008. http://yadda.icm.edu.pl/yadda/element/bwmeta1.element.agro-c20648d9-6f1c-454b-b6ce-c2fd0eb7a061/c/app20141004_1006_1008.pdf https://www.infona.pl/resource/bwmeta1.element.agro-c20648d9-6f1c-454b-b6ce-c2fd0eb7a061 Yours, Paul H.-
- alvarez
- catastrophism
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60-Million-Year-Old Meteorite Impact Ejecta Discovered on Scotland’s Isle of Skye
Oxytropidoceras posted a topic in Fossil News
Alien Minerals Discovered at Ancient Meteorite Strike Site in Scotland by Katherine Hignett, Newsweek, Dec. 15, 2017 http://www.newsweek.com/skye-meteorites-alien-mineral-749103 60-Million-Year-Old Meteorite Impact Zone Discovered on Scotland’s Isle of Skye, Sci News, December 15, 2017 http://www.sci-news.com/geology/meteorite-impact-scotlands-isle-of-skye-05539.html “A team of geologists has found 60 million-year-old ejecta from a previously unknown meteorite impact on the Isle of Skye, northwest Scotland. This is the first recorded mid-Paleocene impact event in the region and is coincident with the onset of magmatism in the British Paleogene Igneous Province.” The open-access paper is: Drake, S.M., A.D. Beard, A.P. Jones, D.J. Brown, A.D. Fortes, I.L. Millar, A. Carter, J. Baca, and H. Downes, 2017, Discovery of a meteoritic ejecta layer containing unmelted impactor fragments at the base of Paleocene lavas, Isle of Skye, Scotland. Geology. DOI: https://doi.org/10.1130/G39452.1 https://pubs.geoscienceworld.org/gsa/geology/article/525169/discovery-of-a-meteoritic-ejecta-layer-containing Yours, Paul- 1 reply
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- ejecta
- extraterrestrial impact
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Cubic Zirconia Indicates That Ancient Meteorite Impact Produced the Highest Known Natural Temperature On Earth
Oxytropidoceras posted a topic in Rocks & Minerals
Ancient Meteorite Impact Produced Highest Natural Temperature Ever On Earth, Extreme Tech, Sept. 18, 2017 https://www.extremetech.com/extreme/255984-ancient-meteorite-impact-produced-highest-natural-temperature-ever-earth Meteorite Impact Caused the Highest Temperature ever Recorded on Earth's Surface, Phys.Org Sept 18, 2017 https://phys.org/news/2017-09-meteorite-impact-highest-temperature-earth.html The paper is: Nicholas E. Timms, Timmons M. Erickson, Michael R. Zanetti, Mark A. Pearce, Cyril Cayron, Aaron J. Cavosie, Steven M. Reddy, Axel Wittmann, and Paul K. Carpenter, 2017, Cubic zirconia in >2370 °C impact melt records Earth's hottest crust. Earth and Planetary Science Letters Volume 477, Pages 52-58 http://www.sciencedirect.com/science/article/pii/S0012821X1730451X https://infoscience.epfl.ch/record/230363 Mistastin Lake crater, Canada. https://en.wikipedia.org/wiki/Mistastin_crater Yours, Paul H.-
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- canada
- cubic zirconia
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Comet Strike May Have Triggered the Paleocene-Eocene Thermal Maximum (PETM)
Oxytropidoceras posted a topic in Fossil News
Extraterrestrial Impact Preceded Ancient Global Warming Event By Mary L. Martialay, Rensselaer Polytechnic Institute, October 13, 2016 http://news.rpi.edu/content/2016/10/13/extraterrestrial-impact-preceded-ancient-global-warming-event Ancient Meteorite Impact Rained Debris On US East Coast By Calla Cofield, Space.com, October 13, 2016 http://www.space.com/34384-ancient-meteorite-impact-hit-us-east-coast.html Yours, Paul H.-
- east coast united states
- extraterrestrial impact
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