Geologicheskii Vestnik

Studies at the Tanalyk archaeological site revealed a complex of molluscs of the late Kudashevо (Ostashkov) period, as well as additional information on the molluscs of the Late Holocene. A total of 24 species, 17 genera of two classes of Gastropoda (22 species) and Bivalvia (2 species) were identified; of these, 1 terrestrial and 3 freshwater species lived in the Holocene, the rest — in the Kudashevo period of the Neopleistocene, where they were represented by 6 terrestrial and 18 freshwater species. According to malacological data, in the area of the Tanalyk locality during the late Kudashevo period of the Late Neopleistocene and in the Holocene there was a small river (Pra-Tanalyk) with a calm current, with quiet silting and overgrown coastal backwaters (sometimes drying up). Constructions based on molluscs are confirmed by lithological and palynological data. Herbaceous vegetation (more moisture-loving and meadow-type — on the high floodplain) grew on the high floodplain and the first floodplain terrace there; rare trees and shrubs, possibly, appeared in Holocene. Thus, the paleoenvironments of the Late Neopleistocene were more xerophytic and of the Holocene were close to the modern ones.

Neopleistocene, Holocene, Quaternary molluscs, palaeoreconstructions

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