Results 21 to 30 of about 1,487,618 (230)

GOLD POTENTIAL OF THE UPPER DEVONIAN BASAL CONGLOMERATES OF THE KANIN PENINSULA (NENETS AUTONOMOUS DISTRICT, RUSSIA) [PDF]

open access: yesМинералогия, 2022
Native gold and garnets are described for the first time in heavy concentrates from coarse-grained sediments of the Upper Devonian Tayaokuyakha Formation, which occurs on the eroded Upper Riphean schists with angular and azimuthal unconformity (middle ...
M.A. Pavlova   +5 more
doaj   +1 more source

Devonian-Carboniferous palynoflora

open access: yes, 2020
Palynomorph assemblages and palynofacies analysis have been performed on several core samples from the Devonian–Carboniferous deposits identified in five wells located in the eastern part of the Moesian Platform.
Daniel Tabara (8670849)
core   +3 more sources

Devonian upper ocean redox trends across Laurussia: Testing potential influences of marine carbonate lithology on bulk rock I/Ca signals

open access: yesFrontiers in Marine Science, 2022
The Devonian is characterized by major changes in ocean-atmosphere O2 concentrations, colonialization of continents by plants and animals, and widespread marine anoxic events associated with rapid δ13C excursions and biotic crises. However, the long-term
Ruliang He   +5 more
doaj   +1 more source

Paleomagnetism of Phanerozoic Geological Complexes in Tuva

open access: yesВестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле, 2020
The authors have investigated palaeomagnetically the Ordovician, Upper Devonian and Lower Carboniferous strata in Tuva. In the rocks, postfolding secondary and prefolding magnetization components were isolated.
Коваленко Д.В.   +3 more
doaj   +1 more source

Lithological and biostratigraphic characteristics of the Upper Silurian and Lower Devonian deposits of the southwestern part of the field named after Roman Trebs

open access: yesGeoresursy, 2018
A conodont sequence from the Przhidolian stage of the Upper Silurian and almost the entire Lokhkovian stage of the Lower Devonian has been established in the sections of the Upper Silurian-Lower Devonian on the southwestern part of the field named after ...
Т.М. Mavrinskaya   +2 more
doaj   +1 more source

The stratigraphie distribution of antiarch remains (Pisces, Placodermi) in Devonian of southern regions of Russia

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2015
The stratigraphic distribution of antiarch remains in the Middle-Upper Devonian of central, southern and east-south regions of East European Platform (EEP), western slope of South Urals and Siberia are analyzed.
S. V. Moloshnikov
doaj   +1 more source

A vertical water exchange of the groundwater in the central part of Moscow artesian basin

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2017
The hydrogeological features of the central part of the Moscow artesian basin (MAB) under the natural conditions provided the existence of the downward vertical flows of the groundwater, the formation of the fresh underground waters of the Carboniferous ...
N. V. Fisun
doaj   +1 more source

Scientific and applied significance of late devonian paleontological thin sections collection (algoflora) stored in the Institute of Geological Sciences of the National Academy of Sciences of Ukraine

open access: yesМінеральні ресурси України, 2023
Information on the thin sections collection from Late Devonian deposits of Donets Basin, the Dnipro-Donets Depression, the Pre-Dobrudzhian and Lviv Paleozoic Toughs is provided.
O. A. Sukhov, A. D. Gusarova
doaj   +1 more source

Devonian–Carboniferous extension and Eurekan inversion along an inherited WNW–ESE-striking fault system in Billefjorden, Svalbard

open access: yesOpen Research Europe, 2023
Background The Billefjorden area in central Spitsbergen hosts thick Lower–lowermost Upper Devonian, late–post-Caledonian collapse deposits presumably deformed during the Late Devonian Svalbardian
Jean-Baptiste P. Koehl   +2 more
doaj   +1 more source

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