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11 by Vladimir I. Davydov1, Brian F. Glenister2, Claude Spinosa3, Scott M. Ritter4, V. V. Chernykh5, B. R. Wardlaw6, and W. S. Snyder3 Proposal of Aidaralash as Global Stratotype Section and Point (GSSP) for base of the Permian System 1. All Russian Geological Research Institiute (VSEGEI), St. Petersburg, Russia 2. University of Iowa 3. Permian Research Institute, Boise State University, Idaho 82735 4. Brigham Young University 5. Institute of Geology and Geochemistry, Ural Branch of Russian Academy of Sciences, Sverdlovsk, Russia 6. U.S. Geological Survey The base of the Permian System was originally defined of local letter-designated stages for the Permian are still being uti- (Murchison, 1841) in the Ural Mountains of Russia to lized (e.g. Archbold et al., 1993) despite the fact that the Urals inter- coincide with strata marking the initiation of evaporite national standard has served effectively as a Western Australian ref- deposition, now recognized as the Kungurian Stage. erence for over one-half century (e.g. Miller, 1932). Similarly, in Since that time, the base has been lowered repeatedly to China the base of the Permian became stabilized at the unconformity c c c cydcPdddddddddddddddddddddddddddddddddddddddddddddddddddddTfc yPdddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddIfc cddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddc dc ddfc cd dc dc dc dc dc dchfyPdddddTc ddfc cd dc dc dc dc dc dchecdddHwcs9dIc ddfc cd dc dc dc dc dc ctdchecd@wf9dcheddddgcyPddTcfddcducfyPTu ddfc include a succession of faunas with post-Carboniferous cd dc dc dc dc dc y8dchecdrcfcxdcheddddPTcdcPdddddAfddcddddddddddddTc ddfc cd dc dc dcheyPdddddddddddddddddddddddddddddddddddddddddddddddddddddddddchecdhdcheQddddddddddddddddIfddcdddddddddddddIc ddfc cddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddchecdhdchecdddddddddddddddddfddcdddcddcdddddddc ddfc cddddddddddddddddHwchedc dc dc dc ddgddcgcdddddhdvhe9dddddddddddddddddfQdd@dcQddddddddSc ddfc cdfdc dc dc dc dc ddgUddcgcdddddhdIheRdHcRHc9dddddddddfRHcdcRdddHcRHc ddfc cdfdc dc dc dv dc ddgdddcgcdhfdd xddc ddfc cdfdc dv dc dI dc ddgdddcgcdhfQd cdSc ddfc cdfdc dI dv dd dc ddfctdcdcgtdhf9dddddchftdrc ddfc cdfdc dd dI dd dc ddfcUdcdcgUdhfcRHddPddchUdPdddd ddfc cdfdc dd dS dd dc ddfcddcdcfctdd cddddddvhddddd9d ddfc cdfdc dd dc dd dc ddftddcdcf8dS cddHwcdIfcPddddddccd cddc ddfc cdfdc dd dI dd dc ddfUddcdcfUd@ ddf8ddddddcUd cyduhecddc ddfc cdfdc dd dd ddvc dc ddfdddcdcfddrc cPdddddecy8dddddddcddhfcyPddddddcgcddv ddfc affinities. 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  • Distributions of Extinction Times from Fossil Ages and Tree Topologies: the Example of Some Mid-Permian Synapsid Extinctions

    Distributions of Extinction Times from Fossil Ages and Tree Topologies: the Example of Some Mid-Permian Synapsid Extinctions

    bioRxiv preprint doi: https://doi.org/10.1101/2021.06.11.448028; this version posted June 11, 2021. The copyright holder for this preprint (which was not certified by peer review) is the author/funder. All rights reserved. No reuse allowed without permission. Distributions of extinction times from fossil ages and tree topologies: the example of some mid-Permian synapsid extinctions Gilles Didier1 and Michel Laurin2 1IMAG, Univ Montpellier, CNRS, Montpellier, France 2CR2P (“Centre de Recherches sur la Paléobiodiversité et les Paléoenvironnements”; UMR 7207), CNRS/MNHN/UPMC, Sorbonne Université, Muséum National d’Histoire Naturelle, Paris, France June 11, 2021 Abstract Given a phylogenetic tree of extinct and extant taxa with fossils where the only temporal infor- mation stands in the fossil ages, we devise a method to compute the distribution of the extinction time of a given set of taxa under the Fossilized-Birth-Death model. Our approach differs from the previous ones in that it takes into account the possibility that the taxa or the clade considered may diversify before going extinct, whilst previous methods just rely on the fossil recovery rate to estimate confidence intervals. We assess and compare our new approach with a standard previous one using simulated data. Results show that our method provides more accurate confidence intervals. This new approach is applied to the study of the extinction time of three Permo-Carboniferous synapsid taxa (Ophiacodontidae, Edaphosauridae, and Sphenacodontidae) that are thought to have disappeared toward the end of the Cisuralian, or possibly shortly thereafter. The timing of extinctions of these three taxa and of their component lineages supports the idea that a biological crisis occurred in the late Kungurian/early Roadian.
  • Wandrawandian Siltstone, New South Wales: Record of Glaciation?

    Wandrawandian Siltstone, New South Wales: Record of Glaciation?

    University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Earth and Atmospheric Sciences, Department Papers in the Earth and Atmospheric Sciences of 2007 Lithostratigraphy of the late Early Permian (Kungurian) Wandrawandian Siltstone, New South Wales: Record of glaciation? S. G. Thomas Southern Methodist University, [email protected] Christopher R. Fielding University of Nebraska-Lincoln, [email protected] Tracy D. Frank University of Nebraska-Lincoln, [email protected] Follow this and additional works at: https://digitalcommons.unl.edu/geosciencefacpub Part of the Earth Sciences Commons Thomas, S. G.; Fielding, Christopher R.; and Frank, Tracy D., "Lithostratigraphy of the late Early Permian (Kungurian) Wandrawandian Siltstone, New South Wales: Record of glaciation?" (2007). Papers in the Earth and Atmospheric Sciences. 105. https://digitalcommons.unl.edu/geosciencefacpub/105 This Article is brought to you for free and open access by the Earth and Atmospheric Sciences, Department of at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Papers in the Earth and Atmospheric Sciences by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. Published in Australian Journal of Earth Sciences 54 (2007), pp. 1057–1071; doi: 10.1080/08120090701615717 Copyright © 2007 Geological Society of Australia; published by Taylor & Francis. Used by permission. Submitted March 22, 2006; accepted June 21, 2007. Lithostratigraphy of the late Early Permian (Kungurian) Wandrawandian
  • Sequence Biostratigraphy of Carboniferous-Permian Boundary

    Sequence Biostratigraphy of Carboniferous-Permian Boundary

    Brigham Young University BYU ScholarsArchive Theses and Dissertations 2019-07-01 Sequence Biostratigraphy of Carboniferous-Permian Boundary Strata in Western Utah: Deciphering Eustatic and Tectonic Controls on Sedimentation in the Antler-Sonoma Distal Foreland Basin Joshua Kerst Meibos Brigham Young University Follow this and additional works at: https://scholarsarchive.byu.edu/etd Part of the Physical Sciences and Mathematics Commons BYU ScholarsArchive Citation Meibos, Joshua Kerst, "Sequence Biostratigraphy of Carboniferous-Permian Boundary Strata in Western Utah: Deciphering Eustatic and Tectonic Controls on Sedimentation in the Antler-Sonoma Distal Foreland Basin" (2019). Theses and Dissertations. 7583. https://scholarsarchive.byu.edu/etd/7583 This Thesis is brought to you for free and open access by BYU ScholarsArchive. It has been accepted for inclusion in Theses and Dissertations by an authorized administrator of BYU ScholarsArchive. For more information, please contact [email protected], [email protected]. Sequence Biostratigraphy of Carboniferous-Permian Boundary Strata in Western Utah: Deciphering Eustatic and Tectonic Controls on Sedimentation in the Antler-Sonoma Distal Foreland Basin Joshua Kerst Meibos A thesis submitted to the faculty of Brigham Young University in partial fulfillment of the requirements for the degree of Master of Science Scott M. Ritter, Chair Brooks B. Britt Sam Hudson Department of Geological Sciences Brigham Young University Copyright © 2019 Joshua Kerst Meibos All Rights Reserved ABSTRACT Sequence Biostratigraphy of Carboniferous-Permian Boundary Strata in Western Utah: Deciphering Eustatic and Tectonic Controls on Sedimentation in the Antler-Sonoma Distal Foreland Basin Joshua Kerst Meibos Department of Geological Sciences, BYU Master of Science The stratal architecture of the upper Ely Limestone and Mormon Gap Formation (Pennsylvanian-early Permian) in western Utah reflects the interaction of icehouse sea-level change and tectonic activity in the distal Antler-Sonoma foreland basin.
  • From the Lower Permian of Eastern Europe

    From the Lower Permian of Eastern Europe

    Paleontological Research, vol. 9, no. 1, pp. 79–84, April 30, 2005 6 by the Palaeontological Society of Japan A new genus of the family Amblypteridae (Osteichthyes: Actinopterygii) from the Lower Permian of Eastern Europe ARTE´ M M. PROKOFIEV Department of Fishes and Fish-like Vertebrates, Paleontological Institute – PIN, Russian Academy of Sciences, Profsoyuznaya Street, 123, Moscow 117997, Russia (e-mail: [email protected]) Received February 14, 2002; Revised manuscript accepted February 22, 2005 Abstract. A new genus and species of the family Amblypteridae, Tchekardichthys sharovi,fromthe Lower Permian of Eastern Europe (Perm Region of Russia) is described. It can be distinguished from all the known members of the family in the position of the fins and number of fin rays, characters of scalation and cranial roofing bones ornamentation, etc. The newly described taxon apparently lived in estuarine or brackish-water habitats. Key words: actinopterygians, Amblypteridae, Eastern Europe, Lower Permian, new genus and species The elonichthyiform family Amblypteridae is rep- second is situated at the mouth of the Tchekarda resented by five genera and numerous species from River and immediately downstream of the latter, and the Carboniferous to Lower Permian of France, Ger- the third one is situated on the left bank of the Sylva many, Czech Republic, India (Kashmir) and South River 850 m downstream from the mouth of the America, and from the Upper Permian of the Ural Tchekarda River. The specimens described herein are region in Eastern Europe (Agassiz, 1833–1844; Berg, found in the second site. The Tchekarda layers belong 1940; Dunkle and Schaeffer, 1956; Berg et al., 1964; to the Koshelevskaya Formation of the Irenskian Re- Heyler, 1969, 1976, 1997; Beltan, 1978).
  • Carbon and Strontium Isotope Stratigraphy of the Permian from Nevada and China: Implications from an Icehouse to Greenhouse Transition

    Carbon and Strontium Isotope Stratigraphy of the Permian from Nevada and China: Implications from an Icehouse to Greenhouse Transition

    Carbon and strontium isotope stratigraphy of the Permian from Nevada and China: Implications from an icehouse to greenhouse transition Dissertation Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy in the Graduate School of The Ohio State University By Kate E. Tierney, M.S. Graduate Program in the School of Earth Sciences The Ohio State University 2010 Dissertation Committee: Matthew R. Saltzman, Advisor William I. Ausich Loren Babcock Stig M. Bergström Ola Ahlqvist Copyright by Kate Elizabeth Tierney 2010 Abstract The Permian is one of the most important intervals of earth history to help us understand the way our climate system works. It is an analog to modern climate because during this interval climate transitioned from an icehouse state (when glaciers existed extending to middle latitudes), to a greenhouse state (when there were no glaciers). This climatic amelioration occurred under conditions very similar to those that exist in modern times, including atmospheric CO2 levels and the presence of plants thriving in the terrestrial system. This analog to the modern system allows us to investigate the mechanisms that cause global warming. Scientist have learned that the distribution of carbon between the oceans, atmosphere and lithosphere plays a large role in determining climate and changes in this distribution can be studied by chemical proxies preserved in the rock record. There are two main ways to change the distribution of carbon between these reservoirs. Organic carbon can be buried or silicate minerals in the terrestrial realm can be weathered. These two mechanisms account for the long term changes in carbon concentrations in the atmosphere, particularly important to climate.
  • Permian (Artinskian to Wuchapingian) Conodont Biostratigraphy in the Tieqiao Section, Laibin Area, South China

    Permian (Artinskian to Wuchapingian) Conodont Biostratigraphy in the Tieqiao Section, Laibin Area, South China

    Permian (Artinskian to Wuchapingian) conodont biostratigraphy in the Tieqiao section, Laibin area, South China Y.D. Suna, b*, X.T. Liuc, J.X. Yana, B. Lid, B. Chene, D.P.G. Bondf, M.M. Joachimskib, P.B. Wignallg, X.L. Laia a State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430074, China b GeoZentrum Nordbayern, Universität Erlangen-Nürnberg, Schlossgarten 5, 91054 Erlangen, Germany c Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China d Key Laboratory of Marine Mineral Resources, Guangzhou Marine Geological Survey, Ministry of Land and Resources, Guangzhou, 510075, China e State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, 39 East Beijing Road, Nanjing, 210008, R.P. China f School of Environmental Sciences, University of Hull, Hull HU6 7RX, UK g School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK *Corresponding authors Email: [email protected] (Y.D. Sun) © 2017, Elsevier. Licensed under the Creative Commons Attribution- NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/ licenses/by-nc-nd/4.0/ 1 Abstract Permian strata from the Tieqiao section (Jiangnan Basin, South China) contain several distinctive conodont assemblages. Early Permian (Cisuralian) assemblages are dominated by the genera Sweetognathus, Pseudosweetognathus and Hindeodus with rare Neostreptognathodus and Gullodus. Gondolellids are absent until the end of the Kungurian stage—in contrast to many parts of the world where gondolellids and Neostreptognathodus are the dominant Kungurian conodonts. A conodont changeover is seen at Tieqiao and coincided with a rise of sea level in the late Kungurian to the early Roadian: the previously dominant sweetognathids were replaced by mesogondolellids.