LEADING FACTORS OF MORPHOLITHOGENESIS IN THE LATE QUATERNARY HISTORY OF WEST SIBERIA
I.D. Zol'nikov, S.A. Gus'kov, L.A. Orlova, Ya.V. Kuz'min*, and L.K. Levchuk
United Institute of Geology, Geophysics and Mineralogy, Siberian Branch of the RAS, 3 prosp. Akad. Koptyuga, Novosibirsk, 630090, Russia * Pacific Institute of Geography, Far Eastern Branch of the RAS, 7 ul. Radio, Vladivostok, 690032, Russia
Keywords: Sartan horizon, ice-dammed basin, Karga sea transgression, radiocarbon method, paleogeography, West Siberia
Pages: 469-472
Abstract
Some stratigrapho-paleogeographic discrepancies have been removed from the interpretation of spatial-temporal relationship between leading factors of morpholithogenesis in the Late Pleistocene of West Siberia. New data obtained from mammoth remains indicate that there was no ice-dammed basin on the West Siberian Plain in the Sartan time. A hypothesis has been formulated that the Karga marine deposits occur in overdeepened lows, tens of meters below the paleolevel of the ocean, which formed when the ice-dammed waters broke the ice dam to run northward. This refines the configuration of the Karga marine transgression whose deposits are mapped on the north of West Siberia in accordance with a recent stratigraphic scheme. The Late Pleistocene and Holocene of West Siberia include relatively long stages of stable and metastable ecogeological settings alternating with short epochs of drastically contrasting transformations of paleolandscapes.
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