Results 121 to 130 of about 1,820 (158)

Formation of an unusual form of Riphean Eosolenides

Paleontological Journal, 2014
A specific group of tubular microfossil Eosolenides, which display a series of biological innovations for these organic-walled microorganisms, is reported from the Meso-Neoproterozoic boundary beds (Lakhanda Microbiota, 1 Ga). This morphologically diverse group is recognized by the presence of unicellular symbionts and by an external narrowly-segmented
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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Late Riphean Sedimentation in the Central Russian Aulacogen

Lithology and Mineral Resources, 2003
Result of the analysis of combined structural, facies, mineralogical, and micropaleontological data suggest that the formation of the Central Russian Aulacogen was related to the evolution of a major strike-slip system in the Late Riphean on the Russian Plate.
N. P. Chamov, V. V. Kostyleva, A. F. Veis, V. I. Gorbachev   +3 more
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Facies Associations of Riphean Sedimentary Sequences

Lithology and Mineral Resources, 2002
Large-scale facies associations typical of intra- and pericratonic Riphean sections of the Volga–Ural region, western slope of the Urals, Timan–Pechora region, Kola Peninsula, outer and inner parts of the Siberian, North American, and Indian platforms are considered.
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Mayanian (1100–850 Ma) – Prebaikalian Upper Riphean of Siberia

Russian Geology and Geophysics, 2008
Abstract The Mayanian (1100–850 Ma) is an all-Siberian stratigraphic subdivision of the Neoproterozoic distinguished on the basis of generalized geological and paleontological data for the Maya Group in the southeast of the Siberian craton and for its counterparts in other structure-facies areas (SFA).
V.V. Khomentovsky, K.E. Nagovitsin, A.A. Postnikov   +2 more
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Riphean and Cambrian of central Asia

International Geology Review, 1965
Mountain structures of Central Asia are made up largely of Riphean and,Cambrian deposits that are continuous and consistent over thousands of kilometers. It is quite probable that a discrete tectonic belt existed in the Urals, Central Asia, and North China in the Riphean and Cambrian. The Riphean is late Precambrian and Early Cambrian.
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On the constructive possibilities of the Riphean microfossils Eosaccharomyces

Paleontological Journal, 2013
Yeast-like microfossils from the Meso-Neoproterozoic boundary beds of the Neruyen Formation (southeastern Siberia) are studied. The structural features of the fossil organisms the life cycle of which started with the development of single budding cells that subsequently formed complex multicellular microcolonies are described.
T. N. Hermann, V. N. Podkovyrov
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On Aphebian stromatolites and Riphean stromatolite stratigraphy

Precambrian Research, 1977
Abstract New occurrences of typical Riphean stromatolite and microphytolite groups are reported and illustrated from typical Aphebian sequences in Canada. These include Minjaria, Colonnella, and Kussiella from the Mistassini Group of central Quebec, Gymnosolen, Jacutophyton garganicum, Minjaria, Colleniella, Kussiella, Tungussia, Lenia, Osagia, and ...
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The Upper Riphean of the Yenisei Range

Russian Geology and Geophysics, 2007
Abstract The Yenisei Range and the adjacent territories in the east are subdivided into (1) the Mid-Angara intracratonic depression; (2) the Yenisei pericratonic trough; and 3) a marginal oceanic block, the Isakovka-Predivinsk area.
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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 ...
V. N. Sergeev, N. G. Vorob’eva, P. Yu. Petrov   +2 more
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