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Triassic and permo-triassic palaeomagnetic data for S. America
Earth and Planetary Science Letters, 1970Abstract Palaeomagnetic studies have been made on 13 different rock formations. Results from 7 of these to which thermal or A.F. cleaning has been applied show that the south palaeomagnetic pole relative to S. America was situated at 82°S, 154°W with alpha95 = 8°.
Daniel A. Valencio +2 more
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Biogeography of Triassic Ammonoids
2015After the end-Permian mass extinction, ammonoids experienced an explosive recovery followed by episodes of radiation and extinction. These events were associated with sudden biogeographic changes often closely related to major climatic and oceanographic changes. Previous biogeographic studies of Triassic ammonoids have rarely focused on a specific time-
Brayard, Arnaud +4 more
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Tectonics, 2019
Triassic flysch in the Songpan‐Ganzi Complex (SGC), eastern Tibet, is an important and rich record of tectonism associated with evolution and closure of the eastern Paleo‐Tethys Ocean.
X. Jian, A. Weislogel, A. Pullen
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Triassic flysch in the Songpan‐Ganzi Complex (SGC), eastern Tibet, is an important and rich record of tectonism associated with evolution and closure of the eastern Paleo‐Tethys Ocean.
X. Jian, A. Weislogel, A. Pullen
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Biostratigraphy of Triassic Ammonoids
2015The Triassic is a turning point in the evolutionary history of ammonoids, characterized by the flourishing Ceratitida and the appearance of the first heteromorphs. Following the end-Permian mass extinction, ammonoids were among the first groups to rediversify by producing many new taxa.
Jenks, James F. +4 more
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Anisian (Middle Triassic) Conodonts of the Kocaeli Triassic, Western Turkey
Journal of Earth Science, 2021The present study of Anisian (Middle Triassic) conodonts from the Kocaeli Peninsula (western Turkey) encompasses over 10 species of the families Gondolellidae and Gladigondolellidae, providing Early and Middle Triassic time constraints, Chiosella timorensis (Nogami, 1968); Cornudina oezdemirae Gedik, 1975; Gladigondolella tethydis (Huckriede, 1958 ...
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Facies, 2003
Except of the Nakhlak and Aghdarband regions, Lower and Middle Triassic strata in Iran consist almost exclusively of carbonate rocks built on vast platforms along the shelves of the Paleo- and Neotethys. The depositional environments varied from shallow shelf sea to lagoonal and near-shore tidal flats, becoming even evaporitic towards the coastal ...
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Except of the Nakhlak and Aghdarband regions, Lower and Middle Triassic strata in Iran consist almost exclusively of carbonate rocks built on vast platforms along the shelves of the Paleo- and Neotethys. The depositional environments varied from shallow shelf sea to lagoonal and near-shore tidal flats, becoming even evaporitic towards the coastal ...
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Permo-Triassic boundary and Lower to Middle Triassic in South Tibet
Journal of Asian Earth Sciences, 1998Abstract The abundance of conodonts increases sharply across the Permian/Triassic boundary in South Tibet, and as a consequence Griesbachian assemblages are much better defined than Changxingian ones. The “ Otoceras latilobatum bed”, representing the base of the Triassic at Selong, is a condensed biocalcirudite including abundant macrofossils ...
GARZANTI E., NICORA A., RETTORI R.
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Geologische Rundschau, 1982
The tectonic movements which occurred in Thailand between the Permian and the Jurassic (“Indosinian Orogeny”) caused the uplifting and subsidence of areas which were dominant paleogeographic features during the Triassic. The strong orogenic movements during the Norian caused an alteration of the paleogeographic conditions.
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The tectonic movements which occurred in Thailand between the Permian and the Jurassic (“Indosinian Orogeny”) caused the uplifting and subsidence of areas which were dominant paleogeographic features during the Triassic. The strong orogenic movements during the Norian caused an alteration of the paleogeographic conditions.
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Geological Society, London, Special Publications, 1964
Summary Little information is available that can be used with confidence to construct a Triassic time-scale. The base of the system is variously dated in the range 220 to 238 m.y.; the age of the boundary with the Jurassic is also uncertain, but may be placed at about 190 to 200 m.y Apart from a Russian determination giving a minimum age of ...
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Summary Little information is available that can be used with confidence to construct a Triassic time-scale. The base of the system is variously dated in the range 220 to 238 m.y.; the age of the boundary with the Jurassic is also uncertain, but may be placed at about 190 to 200 m.y Apart from a Russian determination giving a minimum age of ...
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Permian-Triassic Extinctions and Rediversifications
2015Ammonoids were a major component of Permian marine faunas, but were on the verge of extinction during the Permian-Triassic crisis ~ 252 myr ago. Despite the severity of this extinction, their recovery was explosive in less than 1.5 myr. By Smithian time, they had already reached levels of taxonomic richness much higher than those of the Permian.
Brayard, Arnaud, Bucher, Hugo
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