Results 221 to 230 of about 7,792 (266)

Early Triassic seawater sulfate drawdown

Geochimica et Cosmochimica Acta, 2014
Abstract The marine sulfur cycle is intimately linked to global carbon fluxes, atmospheric composition, and climate, yet relatively little is known about how it responded to the end-Permian biocrisis, the largest mass extinction of the Phanerozoic. Here, we analyze carbonate-associated-sulfate (CAS) from three Permo–Triassic sections in South China ...
Huyue Song, Jinnan Tong, Thomas J. Algeo, Haijun Song, Haiou Qiu, Yuanyuan Zhu, Li Tian, Steven Bates, Timothy W. Lyons, Genming Luo, Lee R. Kump   +10 more
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Recurrent Early Triassic ocean anoxia

Geology, 2012
The Early Triassic record, from the Smithian stratotype, shows that the organic carbon isotope record from northwest Pangea closely corresponds to major fluctuations in the inorganic carbon records from the Tethys, indicating truly global perturbations of the carbon cycle occurred during this time. Geochemical proxies for anoxia are strongly correlated
S. E. Grasby, B. Beauchamp, A. Embry, H. Sanei   +3 more
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Proteromorphosis in Early Triassic Conodonts

2020
Herein we emphasise how environment, palaeoecology and palaeobiogeography play key roles in the evolution of organisms. Nineteenth-century ammonoid biochronology led to the definition of the Mesozoic stages. Their beginning and end are bound by the biggest mass extinctions of Earth history.
Ali Murat Kiliç, Jean Guex, Francis Hirsch   +2 more
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Early ornithischian dinosaurs: the Triassic record

Historical Biology, 2007
Ornithischian dinosaurs are one of the most taxonomically diverse dinosaur clades during the Mesozoic, yet their origin and early diversification remain virtually unknown.
Randall B. Irmis, William G. Parker, Sterling J. Nesbitt, Jun Liu   +3 more
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Preface: Late Permian–Early Triassic Earth

Global and Planetary Change, 2010
1. IntroductionThe Permian to Triassic interval was a time of major perturbationsin the Earth's system. The change began with the crisis at the end ofthe Guadalupian, followed by major devastation near the Permian–Triassic boundary (PTB), and continued with several severe eventsduring the Early to Middle Triassic (Erwin, 2006; Payne et al., 2004 ...
Ezat Heydari, Thomas C. Wynn, Zhong Qiang Chen   +2 more
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Late Permian to Early Triassic magnetostratigraphy

Earth and Planetary Science Letters, 1991
A Late Permian to Early Triassic magnetostratigraphic reference section is presented. The Lower Triassic part is based on results from marine limestone sections in South China published earlier [1,2]. Reliable new Permian data are added here which have been collected in the Nammal gorge (Salt Range, Northwest Pakistan) where marine sediments have been ...
Maja Haag, Friedrich Heller
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Gastropod evidence against the Early Triassic Lilliput effect

Geology, 2010
Size reduction in the aftermath of the Permian-Triassic mass extinction event has repeatedly been described for various marine organisms, including gastropods (the Lilliput effect). A Smithian gastropod assemblage from Utah, USA, reveals numerous large-sized specimens of different genera as high as 70 mm, the largest ever reported from the Early ...
Brayard, Arnaud, Nützel, Alexander, Stephen, Daniel A., Bylund, Kevin G., Jenks, Jim, Bucher, Hugo   +5 more
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Lethally Hot Temperatures During the Early Triassic Greenhouse

Science, 2012
Too-Hot TimesClimate warming has been invoked as a factor contributing to widespread extinction events, acting as a trigger or amplifier for more proximal causes, such as marine anoxia.Sunet al.(p.366; see the Perspective byBottjer) present evidence that exceptionally high temperatures themselves may have caused some extinctions during the end-Permian.
Yadong, Sun, Michael M, Joachimski, Paul B, Wignall, Chunbo, Yan, Yanlong, Chen, Haishui, Jiang, Lina, Wang, Xulong, Lai   +7 more
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Secular changes in environmental stresses and eukaryotes during the Early Triassic to the early Middle Triassic

Palaeogeography, Palaeoclimatology, Palaeoecology, 2016
Abstract The Early Triassic, following the end-Permian mass extinction, was an interval of severe low diversity. Increasing amounts of evidence demonstrate that variable environmental stresses were widespread and intense after the end-Permian mass extinction.
Ryosuke Saito, Kunio Kaiho, Masahiro Oba, Jinnan Tong, Zhong-Qiang Chen, Satoshi Takahashi, Jing Chen, Li Tian, Raman Kumar Biswas   +8 more
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A Triassic Fauna from Madagascar, Including Early Dinosaurs

Science, 1999
The discovery of a Middle to Late Triassic (∼225 to 230 million years old) terrestrial vertebrate fauna from Madagascar is reported. This fauna documents a temporal interval not well represented by continental vertebrate assemblages elsewhere in the world. It contains two new prosauropod dinosaurs, representing some of the earliest dinosaur occurrences
, Flynn, , Parrish, , Rakotosamimanana, , Simpson, , Whatley, , Wyss   +5 more
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