Results 111 to 120 of about 321 (175)
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TOWARDS STAGE SUBDIVISION OF THE VENDIAN
Геология и геофизика, 2023Путь к ярусному расчленению венда должен лежать через составление полного сводного геологического разреза этого отрезка земной коры - последовательности геологических тел, каждое из которых отражает определенное состояние экосистем. В качестве основы ярусной шкалы венда предлагается использовать сводный разрез венда Сибирской платформы ...
D.V. Grazhdankin +3 more
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Vendian Hydrogeochemistry of the Siberian Platform
Russian Geology and Geophysics, 2021Abstract —The Vendian deposits of the Siberian Platform are represented by four regional horizons (from bottom to top): Nepa, Vilyuchan, Tira, and Danilovka. The TDS of brines in the Nepa and Vilyuchan horizons varies from 170.3 to 470.1 g/L, and the TDS in the overlying Tira and Danilovka horizons, from 84.6 to 583.1 g/L.
D.A. Novikov +4 more
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New palaeomagnetic result from Vendian red sediments in Cisbaikalia and the problem of the relationship of Siberia and Laurentia in the Vendian [PDF]
Geophysical Journal International, 2000 A palaeomagnetic study of Vendian red sediments from the Lena River section on the western margin of Lake Baikal in the region of Cisbaikalia (54°N, 108°E) has isolated a stable remanence with direction D = 296.3°, I = −27.7° (high-temperature component) and a corresponding pole of 2.7°S, 168.2°E.
A N Khramov, S A Pisarevsky
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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.
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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.
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Riphean and Vendian of the USSR
Precambrian Research, 1981Abstract 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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Late Precambrian Dolomites, Vendian Glaciation, and Synchroneity of Vendian Glaciations
The Journal of Geology, 1976The 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.
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Global climates of the Vendian
Russian Journal of Earth Sciences, 2003The 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 ...
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