Loess Accumulation in the Southern Part of European Russia at the End of the Quaternary Period

Konstantinov, E.A.; Zakharov, A.L.; Sychev, N.V.; Mazneva, E.A.; Kurbanov, R.N.; Morozova, P.A.

Авторы: Konstantinov E.A., Zakharov A.L., Sychev N.V., Mazneva E.A., Kurbanov R.N., Morozova P.A.
Журнал: Herald of the Russian Academy of Sciences
Том: 92
Номер: 3
Год издания: 2022
Издательство: Pleiades Publishing, Ltd
Местоположение издательства: Road Town, United Kingdom
Первая страница: 342
Последняя страница: 351
DOI: 10.1134/s1019331622030108
Аннотация: The origin of the loess deposits of the Cis-Caucasus Region, which form an almost continuouscover on the plains from the Sea of Azov to the Peri-Caspian Depression, is one of the controversial issues ofpaleogeography of the southern part of European Russia. The remarkably high thickness (up to 140 m) andextended coastal outcrops in the west and in the east of the region studied is of special interest to geologistsand geographers who consider the loess strata as a unique record of climate conditions of the Quaternary period.The data on the structure, texture, and geochronology of the Upper Pleistocene and Holocene loess deposits,obtained from the study of 25 borehole logs and outcrop sections, distributed through the territory of the CisCaucasus region were received. The average sedimentation rates and the average sand fraction content wereestimated for the stratigraphic units correlated with the global climatostratigraphic units (marine isotopestages (MIS)). It has been established that the source of the loess (wind erosion areas), are the valleys andestuary alluvial plains of large rivers: the Terek, Kuma, Volga, Kuban, and Don. The Peri-Caspian Depression was the dominant source of mineral dust throughout Late Pleistocene and Holocene. Large massifs ofweakly fixed sands and sandy loams of the western Caspian region in combination with a high level of climatearidity and strong east winds created the prerequisites for the transport of huge volumes of mineral dust westward as far as the Sea of Azov.
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Loess Accumulation in the Southern Part of European Russia at the End of the Quaternary Periodстатья

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