Results 71 to 80 of about 242 (131)

Geochemical characteristics of weathering crusts on the Dzhezhimparma Ridge and the Nemskaya Upland (South Timan)

Записки Горного института
Numerous local varieties of weathering crusts are known in the South Timan. They differ in their position in the section, type of weathering products, substrates, and occurrence. The aim of the research is to identify patterns in the distribution of rock-
Oksana V. Grakova, Nataliya Yu. Nikulova, Yuliya S. Simakova   +2 more
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Upper Precambrian (Riphean) in the Southern Urals of U.S.S.R. [PDF]

Geological Magazine, 1977
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OIL AND GAS CONTENT OF THE SIBERIAN PLATFORM RIPHEAN DEPOSITS

Proceedings of the Siberian Department of the Section of Earth Sciences of the Russian Academy of Natural Sciences. Geology, Exploration and Development of Mineral Deposits, 2017
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Riphean basins of the central and western Siberian Platform

Marine and Petroleum Geology, 2011
Abstract The Siberian Platform is unique by its volume of Meso-Neoproterozoic sedimentary deposits. For about one billion years (∼1650–650 Ma) several sedimentary basins were developed here, resulting in the formation of several kilometers thickness of sedimentary cover.
Grigorii Akhmanov
exaly   +2 more sources

Sedimentary evolution of the Riphean–Vendian basin of southeastern Siberia

Precambrian Research, 2001
Abstract The Riphean to Vendian ( ≈1600–540 Ma) sedimentary succession of the southeastern margin of the Siberian platform is 12–14 km thick and consists of terrigenous-carbonate successions termed, from oldest to youngest, the Uchur, Aimchan, Kerpyl, Lakhanda, Uy and Yudoma Groups.
R A Stern, L M Heaman
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New Riphean microbiotas of the Billyakh Group, the north Anabar region (Fomich River basin): To Riphean biostratigraphy of the Siberian platform

Stratigraphy and Geological Correlation, 2007
Excellently preserved organic-walled and silicified microfossils are first found in the Lower Riphean Ust-Il’ya and Kotuikan formations of the Billyakh Group in the northern slope of the Anabar Uplift (the Fomich River basin). Similar assemblages were previously known only from sections located southward in the Kotuikan River basin, and taxonomic ...
P Yu Petrov, V N Sergeev, N G Vorob'Eva
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Riphean stromatolitic formations fringing the East European platform

Stratigraphy and Geological Correlation, 2007
Riphean stromatolitic formations flank the East European epi-Karelian platform only in the east and northeast. They are traceable as long (over 3600 km) relatively narrow belt consisting of two rectilinear segments, one running along the Urals western flank from southern extremity of the Bashkirian meganticlinorium to the Polyudov Ridge and the other ...
exaly   +2 more sources

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
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Fungal remains from the Late Riphean

Paleontological Journal, 2006
The paper describes organic remains of one billion years old from the Lakhanda microbiota of the Uchur-Maya Region of southeastern Siberia. The microfossils were discovered on organic sapropelic films. The preserved morphological characters and some developmental stages of the ancient organisms, which are fixed in fossil state, suggest that some of ...
T. N. Hermann, V. N. Podkovyrov
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Ediacaria in the Siberian hypostratotype of the Riphean

Doklady Earth Sciences, 2008
The study of stratigraphy and paleontology of the Riphean/Vendian boundary strata is fundamental to decoding the transitional (Neoproterozoic) stage in the evolution of the biosphere. During this stage, the Proterozoic-style biota with limited morphological diversity, small size of individual organisms, lack of biogeographic zonation, and low rates of ...
K. E. Nagovitsin, D. V. Grazhdankin, B. B. Kochnev   +2 more
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