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Showing results for tags 'extinction'.
Found 47 results
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Why did trilobites go extinct? By Donavyn Coffey, Live Science, November 2020 https://www.livescience.com/why-trilobites-went-extinct.html The open access paper is: Jonathan L. Payne, Alexandra V. Turchyn, Adina Paytan, Donald J. DePaolo, Daniel J. Lehrmann, Meiyi Yu, and Wei, Calcium isotope constraints on the end-Permian mass extinction. PNAS May 11, 2010 107 (19) 8543-8548 https://www.pnas.org/content/107/19/8543 A totally unrelated article is: The role of cat eye narrowing in cat-human communication by Ellie Bennett, Snippet Science, November 2020 https://www.snippetscience.com/the-role-of-cat-eye-narrowing-in-cat-human-communication The open access paper is: Humphrey T, Proops L, Forman J, Spooner R and McComb K. The role of cat eye narrowing movements in cat-human communication. Sci Rep. 2020 Oct. 10, 16503 https://doi.org/10.1038/s41598-020-73426-0 Yours, Paul H.
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Burning Fossil Fuels Helped Drive Earth’s Most Massive Extinction
butchndad posted a topic in General Fossil Discussion
Burning Fossil Fuels Helped Drive Earth’s Most Massive Extinction https://www.nytimes.com/2020/11/18/science/extinction-global-warming.html?surface=home-discovery-vi-prg&fellback=false&req_id=829253552&algo=identity&imp_id=724592622&action=click&module=Science Technology&pgtype=Homepage -
Film on the meteor-strike that killed the dinosaurs
pachy-pleuro-whatnot-odon posted a topic in Questions & Answers
Hi everyone, Last year we visited a dinosaur show (I believe something like "DinoExpo") in our area in the Alsace (France), where they screened a film about the meteor-strike that killed the dinosaurs. It was spoken in French (though could of course have been voiced-over) and I hadn't seen it before. However, my wife, who normally isn't overly interested in anything dinosaur liked it a lot, to the extent of asking me afterwards whether I could find it so she could finish watching it. As I don't know where to start on it, I thought I'd ask here... So, the documentary's most defining features I remember: 1. It's a 3D animation 2. The topic is the timeline of the impact of the meteor that killed the dinosaurs 3. This timeline is used to explain events that occurred around the world immediately prior and immediately following the impact on an hour by hour pace 4. There seemed to be a greater emphasis on Mongolian dinosaurs than most documentaries I've seen Any pointers in the right direction would be greatly appreciated! -
For Late Ordovician graptolites, a long decline before extinction
Oxytropidoceras posted a topic in Fossil News
For ancient deep-sea plankton, a long decline before extinction University of Buffalo, Press release by Charlotte Hsu Sheets, H.D., Mitchell, C.E., Melchin, M.J., Loxton, J., Štorch, P., Carlucci, K.L. and Hawkins, A.D., 2016. Graptolite community responses to global climate change and the Late Ordovician mass extinction. Proceedings of the National Academy of Sciences, 113(30), pp.8380-8385. Researchgate PDF for above paper Related publications Yours, Paul H. -
Exploding stars may have caused mass extinction on Earth, study shows, University of Illinois at Urbana-Champaign, August 18, 2020 "Killer cosmic rays from nearby supernovae could be the culprit behind at least one mass extinction event, researchers said, and finding certain radioactive isotopes in Earth's rock record could confirm this scenario." The open access paper is: Brian D. Fields, Adrian L. Melott, John Ellis, Adrienne F. Ertel, Brian J. Fry, Bruce S. Lieberman, Zhenghai Liu, Jesse A. Miller, Brian C. Thomas. Supernova triggers for end-Devonian extinctions. Proceedings of the National Academy of Sciences, 2020; 202013774 Yours Paul H.
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Genome Study of Woolly Rhino Shows Stable Population Until 4500 Years Before Extinction
Scylla posted a topic in Fossil News
They sequenced 14 woolly rhino genomes and found that they co-existed with humans for thousands of years with stable population sizes. They then conclude that humans did not cause the extinction, but warming of the climate did. What if wooly rhino just tasted bad? Then humans wouldn't hunt them until the other megafauna were extinct. Or we invented barbeque sauce. Then they would disappear in a blink of an eye. Anyway here's the news article: https://phys.org/news/2020-08-ancient-genomes-woolly-rhinos-extinct.html- 1 reply
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Asteroid shower on the Earth-Moon system 800 million years ago
Oxytropidoceras posted a topic in Fossil News
Asteroid shower rained space rocks on Earth and the moon 800 million years ago By Charles Q. Choi, SpaceCom, July 21, 2020 Asteroid shower on the Earth-Moon system 800 million years ago revealed by lunar craters by Osaka University, PhysOrg, July 21, 2020 The open access paper is: Terada, K., Morota, T. & Kato, M. Asteroid shower on the Earth-Moon system immediately before the Cryogenian period revealed by KAGUYA. Nature Communications (2020). DOI: 10.1038/s41467-020-17115-6 Yours, Paul H.-
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Just found this about the Permian extinction/the great dying, earths greatest mass extinction. https://www.artsci.utoronto.ca/news/geochronologists-shed-light-earths-greatest-mass-extinction
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News article: https://www.miragenews.com/fossil-discoveries-reveal-cause-of-megafauna-extinction/ Open access article: https://www.nature.com/articles/s41467-020-15785-w
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Racki, G., 2020, Volcanism as a prime cause of mass extinctions: Retrospectives and perspectives, in Adatte, T., Bond, D.P.G., and Keller, G., eds., Mass Extinctions, Volcanism, and Impacts: New Developments: Geological Society of America Special Paper 544, p. 1–34 https://www.researchgate.net/publication/337951571_Volcanism_as_a_prime_cause_of_mass_extinctions_Retrospectives_and_perspectives https://www.researchgate.net/profile/Grzegorz_Racki Racki, G., Rakociński, M., Marynowski, L. and Wignall, P.B., 2018. Mercury enrichments and the Frasnian-Famennian biotic crisis: A volcanic trigger proved?. Geology, 46(6), pp.543-546. https://www.researchgate.net/publication/326031821_Mercury_enrichments_and_the_Frasnian-Famennian_biotic_crisis_A_volcanic_trigger_proved Let's be careful out there, Paul H.
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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?- 5 replies
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The enormous and prehistoric Chinese Paddlefish is officially extinct
Oxytropidoceras posted a topic in Fossil News
One of World's Largest Freshwater Fish May Be First Official Extinction of 2020 By Stephanie Pappas, Live Science, January 07, 2020 https://www.livescience.com/chinese-paddlefish-extinct.html This enormous ancient fish is officially extinct By Eva Frederick, Science, Jan. 7, 2020 https://www.sciencemag.org/news/2020/01/enormous-ancient-fish-officially-extinct The paper is: Zhang, H., Jarić, I., Roberts, D.L., He, Y., Du, H., Wu, J., Wang, C. and Wei, Q., 2020. Extinction of one of the world's largest freshwater fishes: Lessons for conserving the endangered Yangtze fauna. Science of The Total Environment, 710, p.136242. https://www.sciencedirect.com/science/article/pii/S0048969719362382 Yours, Paul H.- 5 replies
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Human impact on nature 'dates back millions of years' By Helen Briggs, BBC News, January 20, 2020 https://www.bbc.com/news/science-environment-51068816 The open access paper is: Faurby, S., Silvestro, D., Werdelin, L. and Antonelli, A., Brain expansion in early hominins predicts carnivore extinctions in East Africa. Ecology Letters. https://onlinelibrary.wiley.com/doi/abs/10.1111/ele.13451 https://www.ncbi.nlm.nih.gov/pubmed/31943670 Yours, Paul H.
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Somehow, I find this terribly sad. https://www.bbc.com/future/article/20200128-how-did-the-last-neanderthals-live
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Does anyone know of anywhere that sells anything from the Permian extinction layer? I have matrix/micro glass beads from the KT boundary layer, but I can’t find anything like that from the Permian/Triassic boundary layer, but I can’t imagine there just wouldn’t be anything for sale anywhere, so I was wondering if anyone could point me in the right direction. I’d be curious about remnants of any extinction, but I’m specifically interested in anything Permian extinction.
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I have been asked this question many times. The non avian Dinosaurs died out the the end of the Mesozoic but many other animal groups survived. Among them were the Crocodilians. And people ask me all the time how they survived while the Dinosaurs didn't. So this has inspired me to make my first video on my dedicated Paleontology channel, Paleo Analysis. I am making these videos for the purpose of education so feel free to share this video as well as future videos! https://youtu.be/Gan8Vu4oM0w
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Younger Dryas platinum anomaly reported from South Carolina - Open Access paper
Oxytropidoceras posted a topic in Fossil News
New evidence that an extraterrestrial collision 12,800 years ago triggered an abrupt climate change for Earth, the Conversation, October 22, 2019 https://theconversation.com/new-evidence-that-an-extraterrestrial-collision-12-800-years-ago-triggered-an-abrupt-climate-change-for-earth-118244 the paper is: Moore, C.R., M.J. Brooks, A.C. Goodyear, T.A. Ferguson, A.G. Perrotti, S. Mitra, A. Listecki, B. King, D.J. Mallinson, C.S. Lane, B. Shapiro, J. Knapp, A. West, D.L. Carlson, W. Wolbach, T.R. Them, S.M. Harris, and S. Pyne-O’Donnell. 2019. Sediment Cores from White Pond, South Carolina, contain a platinum anomaly, pyrogenic carbon peak, and coprophilous spore decline at 12.8 ka. Scientific Reports volume 9, Article number: 15121 (2019) https://www.nature.com/articles/s41598-019-51552-8 Regardless of how the platinum anomaly is interpreted, White Pond, a Carolina Bay predates it and the Younger Dryas. Thus, the above paper further supports the idea that the Carolina Bays are not connected to Younger Dryas event as concluded by: Schaetzl, R.J., Sauck, W., Heinrich, P.V., Colgan, P.M. and Holliday, V.T., 2019. Commentary on Klokočník, J., Kostelecký, and Bezděk, A. 2019. The putative Saginaw impact structure, Michigan, Lake Huron, in the light of gravity aspects derived from recent EIGEN 6C4 gravity field model. Journal of Great Lakes Research 45: 12–20. A related paper is: Krause, T.R., Russell, J.M., Zhang, R., Williams, J.W. and Jackson, S.T., 2019. Late Quaternary vegetation, climate, and fire history of the Southeast Atlantic Coastal Plain based on a 30,000-yr multi-proxy record from White Pond, South Carolina, USA. Quaternary Research, 91(2), pp.861-880. Vancouver Yours Paul H.-
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VAIMCLOUH End-Permian (252 Mya) deforestation, wildfires and flooding—An ancient biotic crisis with lessons for the present Vivi Vajda,, StephenMcLoughlin, Chris Mays, Tracy D.Frank, Christopher R.Fielding, AllenTevyaw, Veiko Lehsten, Malcolm Bocking, Robert S.Nicoll Earth and Planetary Science Letters 529(2020)115875 !!!!!!!!!!!!!!! NB: 7,3 Mb editorial note: Having some pre-existing knowledge of organic petrology,palynology,geochemistry would be helpful
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DNA analysis suggests humans pushed cave bears to extinction (open access)
Oxytropidoceras posted a topic in Fossil News
Humans pushed cave bears to extinction, their DNA suggests Washington Post, By Ben Guarino, August 15 2019 https://www.washingtonpost.com/science/2019/08/15/humans-pushed-cave-bears-extinction-their-dna-suggests/ Gretzinger, J., Molak, M., Reiter, E., Pfrengle, S., Urban, C., Neukamm, J., Blant, M., Conard, N.J., Cupillard, C., Dimitrijević, V. and Drucker, D.G., 2019. Large-scale mitogenomic analysis of the phylogeography of the Late Pleistocene cave bear. Scientific reports, 9. (open access) https://www.nature.com/articles/s41598-019-47073-z Yours, Paul H.- 2 replies
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The Mesozoic Extinction - April Meeting of the North Coast Fossil Club
mcgcsp posted a calendar event in Calendar
untilNORTH COAST FOSSIL CLUB APRIL MEETING Our main speaker will be Nathan Smith who is a volunteer in the Vertebrate Paleontology Department at the Cleveland Museum of Natural History. The title of his talk will be "The Mesozoic Extinction". For this month's Collector's Corner you are invited to bring in your Mesozoic/Cretaceous Fossils for showing others and sharing information. The Public is Welcome!!!-
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What were the largest animals to survive the KT extinction?
aplomado posted a topic in Questions & Answers
What were the largest animals to survive the KT extinction? -
It seems to me that our feral horses should be considered "Native Wildlife" like any other. Why did horses in North America go extinct?
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Anyone seen the new paper on the possible causes of megalodon extinction? Haven't had a chance to read more than the abstract yet, but looks interesting: https://peerj.com/articles/6088/ @Gizmo
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From the album Invertebrates and plants(& misc.)
Debris, including micro glass "beads" from melted earth ejected into the air, from the KT boundary burn layer. Garfield county, Montana, Hell Creek formation. Late cretaceous (duh) *i added "misc." to this album because this didn't fit anywhere, and I thought it was really cool and should definitely be included somewhere. **There could even be vaporized dinosaur material as part of the glass and melted debris included. There definitely was plenty of it, but I guess realistically, unless it became evenly spread into the atmosphere and airborne debris, this is too small an amount of ejecta, and by percentage such a minuscule amount of vaporized dino, so sadly there probably isn't any. -
Here's Why Over 80% of All Life on Earth Was Wiped Out 250 Million Years Ago. A chain reaction of death. https://www.sciencealert.com/end-permian-triassic-extinction-event-volcano-eruption-lithospheric-halogens https://www.sciencedaily.com/releases/2018/08/180827121348.htm https://phys.org/news/2018-08-geologists-uncover-clues-largest-mass.html https://www.eurekalert.org/pub_releases/2018-08/uota-gun082418.php the paper is: Michael W. Broadley, Peter H. Barry, Chris J. Ballentine, Lawrence A. Taylor and Ray Burgess, 2018, End-Permian extinction amplified by plume-induced release of recycled lithospheric volatiles. Nature Geoscience https://www.nature.com/articles/s41561-018-0215-4 Yours, Paul H.
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