Аннотация:The closing stages of the Atelian epoch of development in the Caspian Sea (filling of regressive cuttings with sediments of freshwater basins) occurred in the initial stages of the Valdai interstadial epoch on the East European Plain. But the lowest level of the Atelian regression and formation of erosive cuttings in the territory of the Northern Caspian Sea were timed to the global cold snap in the Early Valdai glacial epoch (MIS 4). The radiocarbon dating determined on humic acids which are emitted from the Atelian deposits lie in the age interval of 36,680 ± 850 to 40,830 ± 100, the calibrated age being 41,191 ± 750 to 44,390 ± 180 years.