Results 21 to 30 of about 46,904 (239)

Analysis of the Importance of Extension in Accounting for the Post-Carboniferous Subsidence of the North Sea Basin [PDF]

open access: yes, 1986
Post Carboniferous sedimentary deposition in the Central North Sea basins can be separated into three major periods: Permian, Triassic and mid-Jurassic through present.
Hellinger, Steven J.   +2 more
core   +1 more source

Sequence stratigraphy, paleogeography, and coal accumulation regularity of major coal-accumulating periods in China

open access: yesInternational Journal of Coal Science & Technology, 2020
There are 9 major coal-accumulating periods during geological history in China, including the Early Carboniferous, Late Carboniferous-Early Permian, Middle Permian, Late Permian, Late Triassic, Early-Middle Jurassic, Early Cretaceous, Paleogene and ...
Longyi Shao   +13 more
doaj   +1 more source

Pennsylvanian-Early Triassic stratigraphy in the Alborz Mountains (Iran) [PDF]

open access: yes, 2009
New fieldwork was carried out in the central and eastern Alborz, addressing the sedimentary succession from the Pennsylvanian to the Early Triassic.
Al-Belushi   +92 more
core   +2 more sources

Zooidogamy in the Late Permian genus Glossopteris [PDF]

open access: yesJournal of Plant Research, 2004
We describe details of anatomically preserved fossil glossopterid ovules from the Late Permian of Queensland, Australia, that contain several pollen tubes at various stages of releasing flagellated sperm. Each sperm is approximately 12.7 microm long and 13.9 microm wide, with a conspicuous spiral structure comprised of a series of dots that resemble ...
Harufumi, Nishida   +3 more
openaire   +2 more sources

Wildfire evidence from the Middle and Late Permian Hanxing Coalfield, North China Basin

open access: yesGeologica Acta, 2020
Earth has a long geological history and palaeo-wildfire is one of the key factors which is responsible for the evolution and extinction of our earth systems. The most important extinction of our earth systems is the Permian-Triassic mass extinction.
L. Xiao   +5 more
doaj   +3 more sources

Correction of two Upper Paleozoic stratigraphic units in the Tianshan Mountains region, Xinjiang Uygur Autonomous Region and implications on the Late Paleozoic evolution of Tianshan tectonic complex, Northwest China

open access: yesJournal of Palaeogeography, 2015
The present paper addresses two tectonostratigraphic concerns on the Late Paleozoic Tianshan tectonic complex (TTC), Xinjiang, Northwest (NW) China: (1) stratigraphic succession and age constraint of the Bayingou ophiolite mélange, eastern Tianshan ...
Zhong-Qiang Chen   +2 more
doaj   +1 more source

Carboniferous and Permian magmatism in Scotland [PDF]

open access: yes, 2004
Extensional tectonics to the north of the Variscan Front during the Early Carboniferous generated fault-controlled basins across the British Isles, with accompanying basaltic magmatism.
Fitton, J.G.   +4 more
core   +1 more source

Late Permian ichthyofauna from the North-Sudetic Basin, SW Poland [PDF]

open access: yesActa Palaeontologica Polonica, 2021
The late Permian time was a transformative period before the most severe mass extinction known. Even though fishes constitute a key component of marine ecosystems since the Silurian, their biogeographic patterns during the late Permian are currently ...
Darja Dankina   +3 more
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   +57 more
core   +1 more source

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