نتایج جستجو برای: lower triassic

تعداد نتایج: 695069  

2016
Peter A. Hochuli Anna Sanson-Barrera Elke Schneebeli-Hermann Hugo Bucher

Generally Early Triassic floras are believed to be depauperate, suffering from protracted recovery following the Permian-Triassic extinction event. Here we present palynological data of an expanded East Greenland section documenting recovered floras in the basal Triassic (Griesbachian) and a subsequent fundamental floral turnover, postdating the Permian-Triassic boundary extinction by about 500...

Journal: :Science 1987
P E Olsen N H Shubin M H Anders

The discovery of the first definitively correlated earliest Jurassic (200 million years before present) tetrapod assemblage (Fundy basin, Newark Supergroup, Nova Scotia) allows reevaluation of the duration of the Triassic-Jurassic tetrapod extinction event. Present are tritheledont and mammal-like reptiles, prosauropod, theropod, and ornithischian dinosaurs, protosuchian and sphenosuchian croco...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2017
Lawrence M E Percival Micha Ruhl Stephen P Hesselbo Hugh C Jenkyns Tamsin A Mather Jessica H Whiteside

The Central Atlantic Magmatic Province (CAMP) has long been proposed as having a causal relationship with the end-Triassic extinction event (∼201.5 Ma). In North America and northern Africa, CAMP is preserved as multiple basaltic units interbedded with uppermost Triassic to lowermost Jurassic sediments. However, it has been unclear whether this apparent pulsing was a local feature, or if pulses...

Journal: :The Journal of the Geological Society of Japan 1925

Journal: :The Journal of the Geological Society of Japan 1954

2014
Xiao-hong Chen Ryosuke Motani Long Cheng Da-yong Jiang Olivier Rieppel

Parahupehsuchus longus is a new species of marine reptile from the Lower Triassic of Yuan'an County, Hubei Province, China. It is unique among vertebrates for having a body wall that is completely surrounded by a bony tube, about 50 cm long and 6.5 cm deep, comprising overlapping ribs and gastralia. This tube and bony ossicles on the back are best interpreted as anti-predatory features, suggest...

2014
António Mateus Claudio Riccomini Ezequiel J. E. C. B. Ferreira C. G. Tassinari

Manuscrito ID: 30163. Recebido em: 19/09/2014. Aprovado em: 19/09/2014. ABSTRACT: New lines of geological evidence strongly suggest that the main period of hydrocarbon maturation within Assistência Formation should be Permian-Triassic, stimulated by a high geothermal gradient that also sustained various manifestations of hydrothermal activity. Three main stages of fluid/hydrocarbon migration ca...

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