Results 21 to 30 of about 4,836,614 (283)

Facies changes, sedimentary environments and sequence stratigraphy of the lower Carboniferous deposits in the Kalmard area, Central Iran, Member D of Gachal formation [PDF]

open access: yesJournal of Stratigraphy and Sedimentology Researches
Lower Carboniferous deposits of Kalmard area identified with informal Gachal formation which in different outcrops have different lithologic features. This formation is consists of four members A, B, C and D that predominantly consists of carbonate and ...
Mohammadnabi Gorgij   +1 more
doaj   +1 more source

Calcareous algae of the Visean-Serpukhovian boundary beds in the Izyayu River section (south of the Chernyshev Uplift) [PDF]

open access: yesНефтегазовая геология: Теория и практика, 2023
We consider changes in the composition of the algaflora in the Visean-Serpukhovian boundary interval in the Izyayu River section. A transgressive trend in changing sedimentation conditions - from extremely shallow water at the end of the Visean to ...
Vevel Ya.A.   +3 more
doaj  

The lower actinopterygian fauna from the Lower Carboniferous Albert shale formation of New Brunswick, Canada – a review of previously described taxa and a description of a new genus and species [PDF]

open access: yesFossil Record, 2017
The Lower Carboniferous Albert shale formation of New Brunswick, Canada, is well-known for the preservation of countless articulated lower actinopterygian palaeoniscoid fishes. This site is at the boundary between the Devonian and the Lower Carboniferous,
K. E. Mickle
doaj   +1 more source

Palaeomagnetism and magnetostratigraphy of the Permian and Triassic of Spitsbergen : a review of progress and challenges. [PDF]

open access: yes, 2008
Permian and Triassic sediments from Svalbard provide a testing ground for evaluating concepts about the polarity and configuration of the geomagnetic field during the Palaeozoic–Mesozoic transition.
Hounslow, Mark W., Nawrocki, Jerzy
core   +5 more sources

Carapaces of the Dnieper-Donets Basin as a New Exploration Target for significant hydrocarbon deposits

open access: yesГеофизический журнал, 2022
New geological structures — displaced blocks of salt overburden — were identified in the axial part of the Dnieper-Donets basin (DDB) beside one of the largest salt domes due to modern high-precision gravity and magnetic surveys and their joint 3D ...
T.O. Petrovska   +3 more
doaj   +1 more source

Lower Carboniferous calcareous algae and foraminifera of the middle part of the central paraxial zone of the Dono-Dnieper Depression (Ukraine)

open access: yesВісник Харківського національного університету імені В.Н. Каразіна. Серія Геологія. Географія. Екологія, 2021
Introduction. Today, the boundary of the Upper Visean and Lower Visean substage of the Dnieper-Donetsk Basin (DDB) remains controversial. The characteristic of associations of foraminifera and calcareous algae of Lower Carboniferous deposits in axial ...
Anastasiia Gusarova, Andrij Matveyev
doaj   +1 more source

New parasitic organisms in a productid brachiopod Eomarginifera lobata from the lower Carboniferous of the Moscow Basin, Russia [PDF]

open access: yesActa Palaeontologica Polonica
Bioclaustrations are among the best ways that parasitic associations are preserved. A new bioclaustration, Haplorygma productidophilia csp. nov., is here described from the ventral interior of the Carboniferous productid brachiopod Eomarginifera lobata ...
Olev Vinn   +2 more
doaj   +1 more source

New data on Upper Carboniferous–Lower Permian deposits of Bol'shevik Island, Severnaya Zemlya Archipelago [PDF]

open access: yesPolar Research, 2015
We present here a detailed study of the Upper Carboniferous–Lower Permian stratigraphy of Bol'shevik Island in the Severnaya Zemlya Archipelago, consisting of the analysis of sedimentary structures and lithostratigraphy, U/Pb detrital zircon dating and ...
Victoria B. Ershova   +5 more
doaj   +1 more source

Geochemical Composition Variations and Tectonic Implications of the Baoligaomiao Formation Volcanic Rocks from the Uliastai Continental Margin, Southeast Central Asian Orogenic Belt [PDF]

open access: yesLithosphere, 2023
The Permo-Carboniferous tectonic evolution in the Uliastai continental margin (UCM), north of the southeast central Asian Orogenic Belt, remains controversial. This work examined the geochemical composition of the felsic volcanic rocks from the lower and
Jianzhou Tang, Zhicheng Zhang, Zejia Ji
doaj   +1 more source

The Brécy depocenter as part of a new northern Massif Central Carboniferous–Permian Basin (France)

open access: yesComptes Rendus. Géoscience, 2023
The reinterpretation of deep wells and the reprocessing and interpretation of 115 km of industrial seismic lines can be used to update the geometry, depositional environments and tectonic evolution of the Carboniferous–Permian Brécy depocenter (southwest
Beccaletto, Laurent, Bourquin, Sylvie
doaj   +1 more source

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