Results 61 to 70 of about 126 (121)
Stromatolites and pulsed oxygenation events in the Mesoproterozoic Longjiayuan formation of western Henan: evidence for life-environment co-evolution. [PDF]
Li Q, Zheng D, Sun F.
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In the section of Upper Riphean deposits along the Chernaya River, located on the southern outskirts of the Minyar town in the Chelyabinsk region, in the sandstones of the Bederysh Subformation of the Zilmerdak Formation, located in the form of interlayers among the thickness of argillites and siltstones, unusual incised bodies of various shapes were ...
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Geochemistry of High-Phosphorus Zircon from the Upper Riphean Sandstones of the Southern Timan
Geochemistry International, 2023A detailed mineralogical and geochemical study (using the EPMA and SIMS methods) of zircon from metasandstones of the Dzhezhim Formation in the South Timan made it possible to establish an anomalously high content of phosphorus in it (up to 10.27 wt % P2O5 according to EPMA data), which correlates with an increased content of other non-formula ...
O. V. Grakova +3 more
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Mayanian (1100–850 Ma) – Prebaikalian Upper Riphean of Siberia
Russian Geology and Geophysics, 2008Abstract 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 +2 more
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Upper Riphean and Vendian sandstones of the Bashkirian anticlinorium
Lithology and Mineral Resources, 2010The analysis of lithogeochemical data on the Upper Riphean and Vendian sandstones from the Bashkirian anticlinorium showed that sandstone associations formed in a passive sluggish tectonic regime in the middle Late Vendian were replaced by associations accumulated in the more active tectonic settings.
A. V. Maslov +2 more
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Rugosoopsis : a new group of Upper Riphean animals
Geological Society, London, Special Publications, 2007Abstract The Upper Riphean Lakhanda biota (from the Uchur-Mayai region of SE Siberia) contains abundant, well preserved and highly biodiverse microfossil assemblages including Rugosoopsis microfossils, characterized by a uniform shape, with prominent closely transversely spaced wrinkles on the outer ...
T. N. Hermann, V. N. Podkovyrov
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LITHIUM-FREE LITHIOPHORITE FROM THE UPPER RIPHEAN SEDIMENTS OF SALAIR
International Geology Review, 1990(1990). LITHIUM-FREE LITHIOPHORITE FROM THE UPPER RIPHEAN SEDIMENTS OF SALAIR. International Geology Review: Vol. 32, No. 3, pp. 302-317.
V. P. Rakhmanov +4 more
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Habitats and probable nature of acritarchs from the Upper Riphean Chencha Formation
Paleontological Journal, 2007Morphology and taphonomy of acritarchs from the Upper Riphean deposits of the Baikal Folded Region (eastern Siberia) are analyzed. The morphotypes of acritarchs are compared to various stages in the life cycle of modern green algae of the order Chlorococcales. The acritarchs Dictyotidium minor Stan.
A. M. Stanevich +3 more
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Geologicheskii vestnik, 2022
The need to correct individual stratigraphic levels of the Regional Stratigraphic Scheme of the Upper Precambrian deposits of the Urals, existing since 1993, is due to the receipt of new data from lithological-stratigraphic, geotectonic and isotope-geochronological studies of the Upper Precambrian of the Southern Urals.
Nina Dmitrievna Sergeeva +1 more
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The need to correct individual stratigraphic levels of the Regional Stratigraphic Scheme of the Upper Precambrian deposits of the Urals, existing since 1993, is due to the receipt of new data from lithological-stratigraphic, geotectonic and isotope-geochronological studies of the Upper Precambrian of the Southern Urals.
Nina Dmitrievna Sergeeva +1 more
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The Upper Riphean of the Yenisei Range
Russian Geology and Geophysics, 2007Abstract 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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