Results 21 to 30 of about 1,852,591 (203)

Tectonic relationship between the Kelameili range and the Dajing depression: Insights into the Carboniferous tectonic-sedimentary framework

open access: yesPetroleum Exploration and Development, 2020
Based on comprehensive analysis of typical outcrops, latest deep wells drilled and high resolution seismic profiles in the study area, we examined the geologic structure of the Kelameili range, and analyzed the structural relationship between the ...
Lei ZHANG, Dengfa HE, Zejun YI, Di LI
doaj   +1 more source

Ostracods (Crustacea) associated with microbialites across the Permian-Triassic boundary in Dajiang (Guizhou Province, South China) [PDF]

open access: yes, 2012
26 samples were processed for a taxonomic study of ostracods from the Upper Permian (Changhsingian) - Lower Triassic (Griesbachian) interval of the Dajiang section, Guizhou Province, South China. 112 species belonging to 27 genera are recognized.
Marie-Beatrice FOREL   +2 more
core   +1 more source

Sedimentology and geochemistry of Middle–Upper Permian in northwestern Turpan–Hami Basin, China: Implication for depositional environments and petroleum geology

open access: yesEnergy Exploration & Exploitation, 2018
Studies have found that the Permian is another important stratum for petroleum exploration except the Jurassic coal measures within Turpan–Hami Basin recently.
Jian Song   +15 more
doaj   +1 more source

High-resolution carbon isotope changes in the Permian-Triassic boundary interval, Chongqing, South China; implications for control and growth of earliest Triassic microbialites [PDF]

open access: yes, 2009
High-resolution delta13C_CARB analysis of the Permian-Triassic boundary (PTB) interval at the Laolongdong section, Beibei, near the city of Chongqing, south China, encompasses the latest Permian and earliest Triassic major facies changes in the South ...
Kershaw, S   +23 more
core   +1 more source

Changes in the shell ornamentation of conchostracans (Phyllopoda, Spinicaudata) at the Permian–Triassic boundary: Case studies from Eastern Europe, Kuznetsk basin, and Verkhoyansk Region

open access: yesУчёные записки Казанского университета: Серия Естественные науки, 2022
This article sums up the results of our study on shell ornamentation of 13 conchostracan species. Their fossil remains were sampled from the Middle and Upper Permian, Induan, and Olenekian (Lower Triassic) deposits of different zoogeographical provinces.
V.V. Zharinova, V.V. Silantiev
doaj   +1 more source

Earliest Triassic microbialites in the South China Block and other areas; controls on their growth and distribution [PDF]

open access: yes, 2007
Earliest Triassic microbialites (ETMs) and inorganic carbonate crystal fans formed after the end-Permian mass extinction (ca. 251.4 Ma) within the basal Triassic Hindeodus parvus conodont zone.
Kershaw, S   +18 more
core   +1 more source

Global taxonomic diversity of anomodonts (tetrapoda, therapsida) and the terrestrial rock record across the Permian-Triassic boundary.

open access: yesPLoS ONE, 2008
The end-Permian biotic crisis (~252.5 Ma) represents the most severe extinction event in Earth's history. This paper investigates diversity patterns in Anomodontia, an extinct group of therapsid synapsids ('mammal-like reptiles'), through time and in ...
Jörg Fröbisch
doaj   +1 more source

New Permo-Carboniferous geochemical data from central Thailand: implication for a volcanic arc model [PDF]

open access: yes, 1991
Current ideas and models of geotectonic reconstructions of Southeast Asia are reviewed and new data on Late Carboniferous through Middle Permian tuffites and sills from central Thailand are presented in the light of the problems of Southeast Asian ...
Altermann, Wladyslaw
core   +1 more source

Biomineralization of primary carbonate cements: a new biosignature in the fossil record from the Anisian of Southern Italy

open access: yesLethaia, EarlyView., 2021
Biomineralization is a generic term used to indicate biological‐mediated mineral formation. In carbonate mineralization, nucleation of crystals can be: (1) controlled directly by the organisms, like in the skeletal formation of most metazoans; (2) induced by microbial communities, by indirect precipitation mediated by their metabolic activities; or (3)
Adriano Guido   +4 more
wiley   +1 more source

geochronological and geochemical data for middle Permian to Middle Triassic igneous rocks in the central Jilin area

open access: yes, 2021
Table S1: Zircon U-Pb dating results for middle Permian to Middle Triassic igneous rocks in the central Jilin area Table S2: Major (wt%) and trace elements (ppm) data for middle Permian to Middle Triassic igneous rocks in central Jilin area Table S3 ...
Luan, J
core   +2 more sources

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