NATURAL ENVIRONMENT OF THE ATELIAN EPOCH (ACCORDING TO THE PALYNOLO GICAL ANALYSIS)
Abstract
The palynological analysis of the Atelian deposits from a borehole drilled within the Korchagin structure in the Northern Caspian Sea was performed. The Atelian deposits of the core were found in the range of 26.6 to 21.8 m, filling the paleodepressions. They are an alternation of thin sand and clays with plant detritus and rare shells of fresh-water and terrestrial gastropods. The results of spore-pollen analysis revealed a complex climate oscillations and dynamic change of natural environments of the area under study during the Atelian regression of the Caspian Sea. The maximum stage of Atelian regression and formation of trenches in the Northern Caspian Sea area coincided with the peak of climate cooling during the Kalinin (MIS 4) glacial epoch on the East European Plain. Its final stages and filling of paleotrenches with freshwater sediments date back to the beginning of the Middle Valdai megainterstadial (MIS 3). The detailed palynological studies of sections from the East European Plain have found that the above-mentioned Valdai intervals are characterized by numerous oscillations of cold stadial and warm interstadial intervals, thus confirming the results for Atelian deposits of the Northern Caspian Sea.
About the Authors
N. S. Bolikhovskaya
Lomonosov Moscow State University.
Russian Federation
Faculty of Geography, Laboratory of Recent Deposits and Pleistocene Paleogeography, Leading Researcher, D.Sc. in Geography.
Russian Federation
Faculty of Geography, Laboratory of Recent Deposits and Pleistocene Paleogeography, Leading Researcher, D.Sc. in Geography.
T. A. Yanina
Lomonosov Moscow State University.
Russian Federation
Faculty of Geography, Department of Geomorphology and Paleogeography, Professor; Laboratory of Recent Deposits and Pleistocene Paleogeography, Head of Laboratory, D.Sc. in Geography.
Russian Federation
Faculty of Geography, Department of Geomorphology and Paleogeography, Professor; Laboratory of Recent Deposits and Pleistocene Paleogeography, Head of Laboratory, D.Sc. in Geography.
V. M. Sorokin
Lomonosov Moscow State University.
Russian Federation
Faculty of Geology, Department of Lithology and Sea Geology, Professor, D.Sc. in Geology and Mineralogy.
Russian Federation
Faculty of Geology, Department of Lithology and Sea Geology, Professor, D.Sc. in Geology and Mineralogy.
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Review
For citations:
Bolikhovskaya N.S., Yanina T.A., Sorokin V.M. NATURAL ENVIRONMENT OF THE ATELIAN EPOCH (ACCORDING TO THE PALYNOLO GICAL ANALYSIS). Vestnik Moskovskogo universiteta. Seriya 5, Geografiya. 2017;(6):96-101. (In Russ.)
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