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Showing results for tags 'mass extinctions'.
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Impacts that produce K-feldspar-rich ejecta blankets correspond to mass extinctions
Oxytropidoceras posted a topic in Fossil NewsNew open access paper about mass extinctions. Pankhurst, M.J., Stevenson, C.J. and Coldwell, B.C., 2021. Meteorites that produce K-feldspar-rich ejecta blankets correspond to mass extinctions. Journal of the Geological Society. 179, jgs2021-055, 1 December 2021 Yours,
Clam fossils help calibrate phylogenic calculations
Oxytropidoceras posted a topic in Fossil NewsClam fossils help scientists find errors in evolutionary tree calculations by Louise Lerner, University of Chicago, PhysOrg, Decemebr 2, 2021 Tha paywalled paper is: Nicholas M. A. Crouch et al, Calibrating phylogenies assuming bifurcation or budding alters inferred macroevolutionary dynamics in a densely sampled phylogeny of bivalve families, Proceedings of the Royal Society B: Biological Sciences (2021). DOI: 10.1098/rspb.2021.2178 Yours, Paul H.
Which brachiopods went extinct during mass extinction event's
DE&i posted a topic in General Fossil DiscussionHi there... Elliot here. Could someone name some species of brachiopods please that became extinct during mass extinction event's. As I'm struggling to find any references. Thank you very much. Elliot.
Globally distributed iridium layer preserved within the Chicxulub impact structure
Oxytropidoceras posted a topic in Fossil NewsIridium in undersea crater confirms asteroid wiped out the dinosaurs Hamish Johnston, Physics World, February 24, 2021, https://physicsworld.com/a/iridium-in-undersea-crater-confirms-asteroid-wiped-out-the-dinosaurs/ Tha paper is: Goderis, S., Sato, H., Ferrière, L, et al. 2021, Globally distributed iridium layer preserved within the Chicxulub impact structure Science Advances 24 Feb 2021: Vol. 7, no. 9, eabe3647 https://advances.sciencemag.org/content/7/9/eabe3647 There are arguments that seismic waves from the Chicxulub imp
Breakup of a long-period comet as the origin of the dinosaur extinction
Oxytropidoceras posted a topic in Fossil NewsAstronomers: 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
Super Computer Analysis of Species Helps Define Mass Extinctions
Scylla posted a topic in Fossil NewsLooking for hidden mass extinctions in the fossil record. Big data comes to paleontology https://www.nature.com/articles/d41586-020-00117-1
Siberian gas venting and the end-Permian environmental crisis
Oxytropidoceras posted a topic in Fossil NewsBelow is an interesting paper, with PDF files online, about the role of contact metamorphism of evaporites and organic rich strata by the Siberian Traps and the end-Permian extinctions. Svensen, H., Planke, S., Polozov, A.G., Schmidbauer, N., Corfu, F., Podladchikov, Y.Y. and Jamtveit, B., 2009. Siberian gas venting and the end-Permian environmental crisis. Earth and Planetary Science Letters, 277(3-4), pp.490-500. http://folk.uio.no/hensven/Svensen_EPSL_2009.pdf https://henriksvensen.wordpress.com/publicationspapers/ https://h
The "Great Expectations Syndrome" and Mass Extinctions
Oxytropidoceras posted a topic in Fossil NewsBelow 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