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Showing results for tags 'asteroid impact'.
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Subfossil confier remains modified by asteroid impact, Hiawatha Glacier, Greenland
Oxytropidoceras posted a topic in Fossil News
Garde, A.A., Søndergaard, A.S., Guvad, C., Dahl-Møller, J., Nehrke, G., Sanei, H., Weikusat, C., Funder, S., Kjær, K.H. and Larsen, N.K., 2020. Pleistocene organic matter modified by the Hiawatha impact, northwest Greenland. Geology, 48(9), pp.867-871. open access paper Supplemental Material: Pleistocene organic matter modified by the Hiawatha impact, northwest Greenland Yours, Paul H.- 1 reply
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- kap københavn
- hiawatha glacier
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K-Pg Impact Spurred the Evolution of the Modern Rainforest
Oxytropidoceras posted a topic in Fossil News
How the Dinosaur-Killing Asteroid Spurred the Evolution of the Modern Rainforest New evidence from fossil plants shows today’s South American rainforests arose in the wake of Earth’s fifth mass extinction. Smithsonian Magazine Prior to the Chicxulub impact, rainforests looked very different Plant fossils from Colombia show a turnover from conifers to today's forests. by Doug Johnson, Ars Technica, April 1, 2021 Paper Carvalho, M.R., Jaramillo, C., de la Parra, F. et al. 2021. Extinction at the end-Cretaceous and the origin of modern Neotropical rainforests. Science. Vol. 372, Issue 6537, pp. 63-68 Related papers Wing, S.L., Herrera, F., Jaramillo, C.A., Gómez-Navarro, C., Wilf, P. and Labandeira, C.C., 2009. Late Paleocene fossils from the Cerrejón Formation, Colombia, are the earliest record of Neotropical rainforest. Proceedings of the National Academy of Sciences, 106(44), pp.18627-18632. Graham, H.V., Herrera, F., Jaramillo, C., Wing, S.L. and Freeman, K.H., 2019. Canopy structure in Late Cretaceous and Paleocene forests as reconstructed from carbon isotope analyses of fossil leaves. Geology, 47(10), pp.977-981. Yours, Paul H.- 1 reply
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- mass extinction
- asteroid impact
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Explosive interaction of impact melt and seawater following the Chicxulub impact event
Oxytropidoceras posted a topic in Fossil News
Osinski, G.R., Grieve, R.A., Hill, P.J., Simpson, S.L., Cockell, C., Christeson, G.L., Ebert, M., Gulick, S., Melosh, H.J., Riller, U. and Tikoo, S.M., 2020. Explosive interaction of impact melt and seawater following the Chicxulub impact event. Geology, 48(2), pp.108-112. https://www.researchgate.net/publication/337464107_Explosive_interaction_of_impact_melt_and_seawater_following_the_Chicxulub_impact_event https://www.researchgate.net/profile/Richard_Grieve/research Gulick, S.P., Bralower, T.J., Ormö, J., Hall, B., Grice, K., Schaefer, B., Lyons, S., Freeman, K.H., Morgan, J.V., Artemieva, N. and Kaskes, P., 2019. The first day of the Cenozoic. Proceedings of the National Academy of Sciences, 116(39), pp.19342-19351. https://www.researchgate.net/publication/335722192_The_first_day_of_the_Cenozoic https://www.pnas.org/content/pnas/116/39/19342.full.pdf Yours, Paul H.-
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- asteroid impact
- chicxulub impact
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Chicxulub impact created massive melt sheet and hydrothermal system
Oxytropidoceras posted a topic in Fossil News
Dino-Killing Asteroid Spawned a Huge Magma Chamber That Lasted Millions of Years by George Dvorsky, Gizmodo, May 29, 2020 https://gizmodo.com/dino-killing-asteroid-spawned-a-huge-magma-chamber-that-1843752492 The open access paper is; D. A. Kring, M. Tikoo, Schmieder, Ulrich Riller, and many others. 2020. Probing the hydrothermal system of the Chicxulub impact crater. Science Advances 29 May 2020: Vol. 6, no. 22, eaaz3053 DOI: 10.1126/sciadv.aaz3053 https://advances.sciencemag.org/content/6/22/eaaz3053 Yours, Paul H-
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- asteroid impact
- chicxulub
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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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Yale University. "In death of dinosaurs, it was all about the asteroid -- not volcanoes." ScienceDaily. ScienceDaily, 16 January 2020. https://www.sciencedaily.com/releases/2020/01/200116141708.htm Meteorite or Volcano? New Clues to the Dinosaurs’ Demise Twin calamities marked the end of the Cretaceous period, and scientists are presenting new evidence of which drove one of Earth’s great extinctions. New York Times, January 16, 2020 https://www.nytimes.com/2020/01/16/science/dinosaurs-extinction-meteorite-volcano.html The paper is: Hull, P.M., Bornemann, A., Penman, D.E., Henehan, M.J., Norris, R.D., Wilson, P.A., Blum, P., Alegret, L., Batenburg, S.J., Bown, P.R. and Bralower, T.J., 2020. On impact and volcanism across the Cretaceous- Paleogene boundary. Science, 367(6475), pp.266-272. https://science.sciencemag.org/content/367/6475/266.abstract Yours, Paul H.
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- paleoclimatology
- cretaceous-paleogene boundary
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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.