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New BBC Dinosaur Wildlife Documentary
Oxytropidoceras replied to Neanderthal Shaman's topic in Fossil News
Tanis: Fossil of dinosaur killed in asteroid strike found, scientists claim Jonathan Amos, BBC News, April 6, 2022 Scientists find fossil from THE DAY the dinosaurs died 66m years ago: Leg of Thescelosaurus was 'ripped off in aftermath' of huge asteroid strike that wiped out most species on Earth, The Daily Mail, April 7, 2022 Among the caims made is: "Experts found the fossilised leg of a dinosaur killed and what appears to be a fragment of the asteroid itself" Yours, Paul H. -
At Tanis, scientists studied the remains of three sturgeons and three paddlefish, using in particular high-resolution X-ray tomographic analysis from the Grenoble European Synchrotron (ESRF). They first established that the fish had indeed perished in the seiche episode, which was accompanied by a rain of glass spherules... https://www.cnn.com/2022/02/23/world/asteroid-dinosaur-extinction-spring-scn/index.html The research is described in a paper published Wednesday (Dec. 8) in the journal Scientific Reports.
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Chicxulub impact tsunami megaripples in the subsurface of Louisiana
Oxytropidoceras posted a topic in Fossil News
Giant tsunami from dino-killing asteroid impact revealed in fossilized ‘megaripples’ By Akila Raghavan, AAAS Science, Jul. 12, 2021 The paper is: Kinsland, G.L., Egedahl, K., Strong, M.A. and Ivy, R., 2021. Chicxulub impact tsunami megaripples in the subsurface of Louisiana: Imaged in petroleum industry seismic data. Earth and Planetary Science Letters, 570, no.117063. Yours, Paul H.- 1 reply
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- chicxulub impact
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Breakup of a long-period comet as the origin of the dinosaur extinction
Oxytropidoceras posted a topic in Fossil News
Astronomers: A comet fragment, not an asteroid, killed off the dinosaurs Jupiter's gravity pushed comet toward Sun; comet was ripped apart by tidal forces. Jennifer Ouellette, ArsTechnica, February 15, 2021 https://arstechnica.com/science/2021/02/astronomers-a-comet-fragment-not-an-asteroid-killed-off-the-dinosaurs/ The open access paper is: Siraj, A. and Loeb, A., Breakup of a Long-Period Comet as the Origin of the Dinosaur Extinction. Scientific Reports volume 11, Article number: 3803 (2021) https://www.nature.com/articles/s41598-021-8232 -
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-
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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,-
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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 Evolut-
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Is the Chicxulub impact still the favored explaination for the extinction?
aplomado posted a topic in Questions & Answers
I read "The Story of the Dinosaurs in 25 Discoveries" by Donald R. Prothero. The author states that paleontologists now mostly do not think that the Chicxulub metor impact killed off the non-avian dinosaurs, and that other explainations are preferred. He did not really explain this statement. That certainly was news to me! I am no professional though. What's the truth? -
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:
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The Dinosaur-Killing Asteroid Acidified the Ocean in a Flash The Chicxulub event was as damaging to life in the oceans as it was to creatures on land, a study shows. New York Times https://www.nytimes.com/2019/10/21/science/chicxulub-asteroid-ocean-acid.html Tiny shell fossils reveal how ocean acidification can cause mass extinction By Julie Zaugg, CNN, October 22, 2019 https://www.cnn.com/2019/10/22/europe/ocean-acidification-asteroid-intl-hnk-scn/index.html New study underpins the idea of a sudden impact killing off dinosaurs and much
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Here is great article about the rocks and sequence of events that happened at ground zero causing the great Cretaceous extinction: https://news.utexas.edu/2019/09/09/rocks-at-asteroid-impact-site-record-first-day-of-dinosaur-extinction/ https://www.foxnews.com/science/scientists-uncover-new-evidence-of-the-asteroid-that-killed-off-the-dinosaurs
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The Nastiest Feud in Science A Princeton geologist has endured decades of ridicule for arguing that the fifth extinction was caused not by an asteroid but by a series of colossal volcanic eruptions. But sheʼs reopened that debate. Bianca Bosker, The Atlantic, September 2018 https://www.theatlantic.com/magazine/archive/2018/09/dinosaur-extinction-debate/565769/ Gerta Keller, Professor of Geosciences http://gkeller.princeton.edu/ Yours, Paul H.
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Seafloor Data Point to Global Volcanism after Chicxulub Impact
Oxytropidoceras posted a topic in Fossil News
The dinosaur-murdering asteroid maybe also triggered an underwater volcano meltdown. Why pick just one flavor of apocalypse? By Rachel Becker, The Verge, Feb 7, 2018 https://www.theverge.com/2018/2/7/16988112/asteroid-chicxulub-mass-extinction-dinosaurs-underwater-volcanoes-magma Seafloor data point to global volcanism after Chicxulub meteor strike, University of Oregon, February 7, 2018 https://www.eurekalert.org/pub_releases/2018-02/uoo-sdp020518.php https://around.uoregon.edu/content/one-two-punch-may-have-helped-deck-dinosaurs The pape
