Results 11 to 20 of about 3,624 (186)

The Osmium Isotope Signature of Phanerozoic Large Igneous Provinces

open access: yesGeophysical Monograph Series, Page 229-246., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Alexander J. Dickson   +2 more
wiley  

+14 more sources

New stratigraphic units of beds with the conchostracan fauna in the Upper Permian and Lower Triassic deposits of Eastern Europe and Siberia

open access: yesУчёные записки Казанского университета: Серия Естественные науки, 2021
The biostratigraphic analysis of conchostracans from the territory of Eastern Europe was based on the study of sections of the Middle–Upper Permian and Lower Triassic deposits of the Upper Volga, Middle Volga–Kama, Dvina–Mezen, and Pechora districts, all,
V.V. Zharinova
doaj   +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

Hydrocarbon Potential of the Late Permian and the Late Triassic Source Rocks from the Qamdo (Changdu) Basin, Eastern Tibet and Its Linkage with the Sea Level Change

open access: yesFrontiers in Earth Science, 2021
The Qamdo Basin in eastern Tibet has significant petroleum potential and previous studies indicate that the basin contains thick potential source rocks of the Late Permian and the Late Triassic ages. In this paper, the petroleum potential of samples from
Zhaolin Qi   +3 more
doaj   +1 more source

PERMIAN FUSULINID ASSEMBLAGES AND STRATIGRAPHY OF THE TRANSCAUCASIA

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 1998
The Permian sequence of the Transcaucasia, which comprises the Davaly, Asni, Gnishik, Arpa, Khachik, and Akhura Formations, is described. A precise dating of the formations based on the analysis of fusulinid assemblages is also provided.
ERNST JA LEVEN
doaj   +1 more source

Discovery of Permian tuff from the northern margin of the Qaidam Basin and its geological implications

open access: yesDizhi lixue xuebao, 2023
Whether the Permian sedimentary records are still preserved in the northern Qaidam Basin is an open issue with various viewpoints. Most regional geological correlations imply that those Permian successions have been wholly eroded or that there is no ...
LIU Jia, QIAN Tao
doaj   +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

Upper Permian bryozoans of central East Greenland [PDF]

open access: yesBulletin of the Geological Society of Denmark, 2008
The bryozoan fauna in the Upper Permian Wegener Halvø, Ravnefjeld and Schuchert Dal formations, central East Greenland is of modest diversity, with only 15 genera identified. Bryozoans are most abundant in the Wegener Halvø Formation where they are important in the formation of carbonate buildups.
Sørensen, Anne Mehlin   +2 more
openaire   +1 more source

The Middle and Upper Permian Deposits in Gorski Kotar: Facts and Misconceptions

open access: yesGeologia Croatica, 2010
The frequent occurrence of sandstones and other coarse-grainedsedimentary rocks in Gorski Kotar indicates molasse type sedimentationas a consequence of the intensive erosion of all uplifted terrain ina tectonically active area.
Dunja Aljinović, Jasenka Sremac
doaj   +1 more source

Indication of natural gas migration and accumulation by three-dimensional fluorescence characteristics of gas-field waters: A case study of the Permian-Triassic in the central-western Sichuan Basin

open access: yesPetroleum Exploration and Development, 2012
Permian-Triassic natural gas migration paths and accumulation patterns in the central-west Sichuan region have been studied by way of examining the three-dimensional shape, light intensity excitation and fingerprint characteristics of aromatic ...
Wei LI
doaj   +1 more source

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