نتایج جستجو برای: triassic boundary

تعداد نتایج: 162654  

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2012
Tetsuji Onoue Honami Sato Tomoki Nakamura Takaaki Noguchi Yoshihiro Hidaka Naoki Shirai Mitsuru Ebihara Takahito Osawa Yuichi Hatsukawa Yosuke Toh Mitsuo Koizumi Hideo Harada Michael J Orchard Munetomo Nedachi

The 34-million-year (My) interval of the Late Triassic is marked by the formation of several large impact structures on Earth. Late Triassic impact events have been considered a factor in biotic extinction events in the Late Triassic (e.g., end-Triassic extinction event), but this scenario remains controversial because of a lack of stratigraphic records of ejecta deposits. Here, we report evide...

2015
Martín D. Ezcurra Pablo Velozo Melitta Meneghel Graciela Piñeiro

The Permo-Triassic archosauromorph record is crucial to understand the impact of the Permo-Triassic mass extinction on the early evolution of the group and its subsequent dominance in Mesozoic terrestrial ecosystems. However, the Permo-Triassic archosauromorph record is still very poor in most continents and hampers the identification of global macroevolutionary patterns. Here we describe crani...

رحیمی, بهنام, مظاهری, سید احمد, کریم‌پور, محمد حسن, قادری, مجید , قوی, جمال ,

Tarikdarreh prospect area is situated in northeastern Iran at the boundary between Central Iran and Kopet-Dagh structural zones. Torbat-e-Jam granitoid intrusion of Triassic age is the main magmatic display in the district. These plutonic rocks with NW-SE trending intruded Miankouhi Formation (Upper Triassic) consisting of coaly shale, siltstone and sandstone converting those to hornfels for te...

Journal: :Geological Society of America Bulletin 2021

Abstract Triassic strata in the Greater Barents Sea Basin are important records of geodynamic activity surrounding catchments and sediment transport Arctic basins. This study is first attempt to investigate evolution these source areas through time. Our analysis budgets from subsurface data application BQART approach estimate catchment properties shows that (1) during Lower Triassic, supply was...

Journal: :Earth and Planetary Science Letters 2022

A detailed magnetostratigraphic study, linked to a new latest Permian U–Pb ID-TIMS age, was undertaken on the continental Shichuanhe section (SCH) in North China order provide magnetic polarity scale for Late Permian–early Middle Triassic interval. Tilt-corrected mean directions of characteristic remanent magnetization pass reversal test and correspond site paleolatitude 18.1°N during Early Tri...

Journal: :Geological Society of America Bulletin 2021

Horacek et al. (2021) commented on our publication arguing that we used an incorrect biochronology to define the Permian-Triassic (PT) boundary and this inaccurate definition resulted in erroneous interpretation of oxygen isotope record studied Chanakhchi (former Sovestashen) section. Their comment gives us opportunity discuss depth identification PT address some flawed arguments

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