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Showing results for tags 'mass extinction event'.
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The impact of the Serpukhovian extinction on Ctenacanthiform diversity
Joseph Fossil posted a topic in Questions & Answers
During the early part of the Serpukhovian stage of the Mississippian period, Carboniferous era around 330 Million years, a mass extinction occurred that wiped out between 13-39% of marine genera. Stanley, S. M. (2016, October 3). Estimates of the magnitudes of major marine mass extinctions in earth history. pnas.org. Retrieved December 30, 2022, from https://www.pnas.org/doi/10.1073/pnas.1613094113 McGhee, G. R., Sheehan, P. M., Bottjer, D. J., & Droser, M. L. (2012, February 1). Ecological ranking of Phanerozoic biodiversity crises: The Serpukhovian (early Carboniferous) crisis had a greater ecological impact than the end-Ordovician. Geology. Retrieved December 30, 2022, from https://pubs.geoscienceworld.org/gsa/geology/article-abstract/40/2/147/130800/Ecological-ranking-of-Phanerozoic-biodiversity?redirectedFrom=fulltext Its causes are still currently unknown and most marine genera groups recovered in the Pennsylvanian period. But I'm curious about the impacts this extinction event had on the diversity on Ctenacanthiformes and other Chondricthyian groups from the time and their subsequent recovery? What do you guys think? @Elasmohunter @Fossildude19 @deutscheben What do you think?-
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Idaho Fossil Finds Shed Light on Life after Permian Mass Extinction
Oxytropidoceras posted a topic in Fossil News
Idaho State University Paleontologist’s Fossil Finds Shed Light on Life after Permian Mass Extinction Idaho State University, November 5, 2021 The open access paper is: Smith, C., Laville, T., Fara, E., Escarguel, G., Olivier, N., Vennin, E., Goudemand, N., Bylund, K.G., Jenks, J.F., Stephen, D.A. and Hautmann, M., 2021. Exceptional fossil assemblages confirm the existence of complex Early Triassic ecosystems during the early Spathian. Scientific Reports, 11(1), pp.1-12. Yours, Paul H.-
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Over 230 million years ago massive Canadian volcanism caused greenhouse warming and a mass extinction that led to increased dinosaur numbers later. This is the Carnian Mass Extinction event https://phys.org/news/2020-09-discovery-mass-extinction.html
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Next time someone asks why study fossils, show them this. If they still don't understand, then just walk away slowly shaking your head. Studies of 360 million year old spores indicates that loss of the ozone layer and increased UV Radiation May explain the end Devonian extinction event. This ozone loss came about because warming led to higher levels of naturally occurring ozone depleting chemicals. This has direct implications for our current global extinction event. Oh, and there is a shark fossil too. https://phys.org/news/2020-05-erosion-ozone-layer-responsible-mass.html
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