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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 News
New 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,-
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- extraterrestrial impacts
- feldspars
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Clam fossils help calibrate phylogenic calculations
Oxytropidoceras posted a topic in Fossil News
Clam 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 Discussion
Hi 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.- 6 replies
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- brachiopods
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Globally distributed iridium layer preserved within the Chicxulub impact structure
Oxytropidoceras posted a topic in Fossil News
Iridium 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 impact did a superfrack job on the Deccan volcanoes and magnified their eruptions. Go see; Richards, M.A., Alvarez, W., Self, S., Karlstrom, L., Renne, P.R., Manga, M., Sprain, C.J., Smit, J., Vanderkluysen, L. and Gibson, S.A., 2015. Triggering of the largest Deccan eruptions by the impact. Geological Society of America Bulletin, 127(11-12), pp.1507-1520. http://eprints.esc.cam.ac.uk/3289/1/Gibson bul gsa.pdf http://pages.uoregon.edu/leif/resources/papers/GSAB_2015_Richards.pdf https://pubs.geoscienceworld.org/gsa/gsabulletin/article-abstract/127/1112/1507/126064 Commentary on flood basalts and mass extinctions: Ernst, R.E. and Youbi, N., 2017. How Large Igneous Provinces affect global climate, sometimes cause mass extinctions, and represent natural markers in the geological record. Palaeogeography, palaeoclimatology, palaeoecology, 478, pp.30-52. Link, Ernst and Youbi (2017), at bottom of page at http://www.largeigneousprovinces.org/downloads http://www.largeigneousprovinces.org/sites/default/files2/Ernst and Youbi 2017 PPP.PDF https://www.sciencedirect.com/science/article/pii/S0031018217302857 Yours, Paul H.-
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- chicxulub crater
- chicxulub impact structure
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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/s41598-021-82320-2 https://www.cfa.harvard.edu/~loeb/SLD.pdf Keep warm and safe out there Paul H. -
Super Computer Analysis of Species Helps Define Mass Extinctions
Scylla posted a topic in Fossil News
Looking for hidden mass extinctions in the fossil record. Big data comes to paleontology https://www.nature.com/articles/d41586-020-00117-1- 2 replies
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Siberian gas venting and the end-Permian environmental crisis
Oxytropidoceras posted a topic in Fossil News
Below 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://henriksvensen.wordpress.com/page/2/ Some related papers are: Burgess, S.D., Muirhead, J.D. and Bowring, S.A., 2017. Initial pulse of Siberian Traps sills as the trigger of the end-Permian mass extinction. Nature Communications, 8(1), p.164. https://www.researchgate.net/publication/318793382_Initial_pulse_of_Siberian_Traps_sills_as_the_trigger_of_the_end-Permian_mass_extinction https://www.researchgate.net/profile/Muirhead_D https://dspace.mit.edu/bitstream/handle/1721.1/113600/s41467-017-00083-9.pdf?sequence=1&isAllowed=y Polozov, A.G., Svensen, H.H., Planke, S., Grishina, S.N., Fristad, K.E. and Jerram, D.A., 2016. The basalt pipes of the Tunguska Basin (Siberia, Russia): High temperature processes and volatile degassing into the end-Permian atmosphere. Palaeogeography, Palaeoclimatology, Palaeoecology, 441, pp.51-64. Svensen, H.H., Frolov, S., Akhmanov, G.G., Polozov, A.G., Jerram, D.A., Shiganova, O.V., Melnikov, N.V., Iyer, K. and Planke, S., 2018. Sills and gas generation in the Siberian Traps. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 376(2130), p.20170080. https://www.researchgate.net/publication/327404155_Sills_and_gas_generation_in_the_Siberian_Traps https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6127383/ https://www.semanticscholar.org/paper/Sills-and-gas-generation-in-the-Siberian-Traps.-Svensen-Frolov/6d0e86fcd2beea7d96c4e15240e50650c2ac235a Rampino, M.R., Rodriguez, S., Baransky, E. and Cai, Y., 2017. Global nickel anomaly links Siberian Traps eruptions and the latest Permian mass extinction. Scientific reports, 7(1), p.12416. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5622041/ http://www.indiaenvironmentportal.org.in/files/file/Siberian trap eruptions.pdf Yours, Paul H.- 1 reply
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- evaporites
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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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