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STRATIGRAPHICAL SIGNIFICANCE OF THE GORNY ALTAI ALLUVIAL DEPOSITS IN THE LATE PLEISTOCENE AND HOLOCENE

I. D. Zolnikov 1,2,3, E. V. Deev 2,3,4

1 V.S.Sobolev Institute of Geology and Mineralogy of the SB RAS, Novosibirsk, Russia; 2 Novosibirsk State University, Novosibirsk, Russia; 3 Institute of Geography of the RAS, Moscow, Russia; 4 A.A.Trofimuk Institute of Petroleum Geology and Geophysics of the SB RAS, Novosibirsk, Russia

It is shown that representative sections of the Late Pleistocene alluvial deposits are found mainly in planations of main valleys and intermountain basins of the Gorny Altai. The data of optically stimulated luminescence and radiocarbon dating characterizing the Malyi Yaloman alluvium in the stratotypic Malyi Yaloman section and in same-age reference sections in the upper, middle and lower reaches of the Katun River are presented. That implied the regional stratigraphical significance of the Malyi Yaloman alluvium and it attribution to the epoch separating two Late Quaternary glaciations of the Gorny Altai. The question is raised of the need to identify the stratigraphical significance of regional and local events that caused not only glacial, but also seismic damming of the Gorny Altai valleys in the Late Pleistocene.

Keywords: alluvium, Pleistocene, Gorny Altai, stratigraphy.

DOI 10.20403/2078-0575-2021-10c-28-35

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