Abstract

According to geologic data the middle terraces of Yalomansko-Katunskaya zone consist of Sal’dzharskaya rock mass. Facial-genetic analysis of this rock mass showed the absence of moraines and fluvio-glacial deposits of close transfer. Sal’dzharskaya rock mass follows with the erosion unconformity the Ininskaya one, of which the upper terrace complex consists. Fluvial complexes formed by enormous floods and imbedded into each other represent the structure of the middle terraces. Series of close levels, grouping at the levels of middle terraces, appeared due to structural denudation along the tilt layers of coarse sediment. Thus, the opinion that Sal’dzharskaya and Ininskaya rock masses are facial analogues and high and middle terraces are cut in the single layer did not find a confirmation. Obviously, middle terrace complex of Yalomansko-Katunskaya zone corresponds to progressive stage of Late Pleistocene glaciation in the southeastern Altai.

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