Results 131 to 140 of about 2,587 (213)

Palaeopascichnids from the Upper Vendian Chernyi Kamen Formation of the Middle Urals (Perm Region)

Doklady Earth Sciences, 2021
Nikolay Kuznetsov, Romanyuk T V, Kuznetsov N B   +2 more
exaly   +2 more sources

Natural radioactivity of groundwater in Vendian deposits in St. Petersburg Region.

Journal of Environmental Radioactivity, 2023
The study is focused on the hydrogeological conditions and the chemistry of groundwater of the Vendian aquifer in the western part of the Leningrad oblast (Karelian Isthmus and the area near Sosnovy Bor town) and St.
A. Shvarts, E. Kaplan, V. G. Rumynin, E. Y. Borovitskaya, V. A. Erzova   +4 more
semanticscholar   +1 more source

Stratigraphic Structure of the Vendian Oil and Gas Complex of the Southern Oil and Gas Regions of the Lena–Tunguska Province of the Siberian Platform

Russian Geology and Geophysics, 2023
—The Vendian oil and gas complex (OGC) consists of the Vilyuchan, Nepa, and Tira stratigraphic horizons. The horizons are divided into correlation layers, stratigraphic charts are refined, cyclometric stratigraphic charts of oil and gas-bearing areas ...
N. V. Mel’nikov
semanticscholar   +1 more source

Vendian Island-Arc Intrusive Magmatism of the Lake Zone of Western Mongolia (Geological, Geochronological, and Petrochemical Data)

Russian Geology and Geophysics, 2021
—Based on new geochronological data on gabbroid and plagiogranitoid associations (Tavan-Hayrhan, East Bayan Tsagaan, Bayan Tsagaan Uul, Tungalag, Three Hills, and Shutkhuin massifs) located among the Vendian island-arc volcanic complexes of the Lake ...
S. Rudnev, A. S. Gibsher, D. V. Semenova
semanticscholar   +1 more source

Riphean and Vendian of the USSR

Precambrian Research, 1981
Abstract The Upper Proterozoic of the U.S.S.R. is subdivided into two chronostratigraphic units according to the officially-adopted stratigraphic scale: the Riphean, 1650 ± 50−650 ± Ma, comprising four subordinate subdivisions; and the Vendian, 650 ± Ma—Cambrian.
N.M. Chumakov, M.A. Semikhatov
openaire   +1 more source

Late Precambrian Dolomites, Vendian Glaciation, and Synchroneity of Vendian Glaciations: A Discussion

The Journal of Geology, 1977
Am. Jour. Sci., v. 274, p. 673-824. ---1974b, No evidence for glacial origin of late Precambrian tilloids in Angola: Nature, v. 252, p. 114-116. ---1975, Tectonic framework of Late Precambrian supposed glacials, in WRIGHT, A. E., and MOSELEY, F., eds., Ice Ages: Ancient and Modern: Geol. Jour., special issue No. 6, p. 241-274. ---1976a, Reply: Am. Jour.
openaire   +2 more sources

PALEOMAGNETISM OF THE VOROGOVKA GROUP: SUBSTANTIATING THE VENDIAN GEOMAGNETIC PHENOMENON (Yenisei Ridge)

Russian Geology and Geophysics
We report new paleomagnetic data for the carbonate-terrigenous section of the Vorogovka Group at its type locality along the Vorogovka River in northwestern Yenisei Ridge.
E. Vinogradov, D. Metelkin, E. Letnikova, L. R. Kosareva, V. Abashev, I. Vishnevskaya   +5 more
semanticscholar   +1 more source

Late Precambrian Dolomites, Vendian Glaciation, and Synchroneity of Vendian Glaciations

The Journal of Geology, 1976
The late Precambrian Vendian Glaciation may have been triggered by a worldwide fall of temperature following the locking up of carbon dioxide in Upper Riphean Dolomites. In this "anti-greenhouse" mechanism, the Vendian case appears to differ from Gondwana and Pleistocene events which are restricted to the poles and not worldwide in extent.
openaire   +1 more source

The Vendian–Cambrian Cyclometric Stratigraphic Scale for the Southern and Central Siberian Platform

Russian Geology and Geophysics, 2021
—The general Vendian stratigraphic scale of Siberia, with the uncertain age of the Vendian base ranging from 600 to 630– 640 Ma in most of recent publications, remains worse constrained than the Cambrian scale, in which the boundaries of epochs and ...
N. V. Mel’nikov
semanticscholar   +1 more source

Global climates of the Vendian

Russian Journal of Earth Sciences, 2003
The global climate of the Vendian has been the subject of considerable debate. In view of the diculties of stratigraphic correlations, the absence of reliably reconstructed positions of continents, the scarcity of climate indicators, and the fact that Vendian outcrop areas are widely separated, it is so far possible to identify only the most general ...
openaire   +1 more source