Pedosedimentary environments in the Caspian Lowland during MIS5 (Srednaya Akhtuba reference section, Russia)

Makeev, A.; Lebedeva, M.; Kaganova, A.; Rusakov, A.; Kust, P.; Romanis, T.; Yanina, T.; Kurbanov, R.

Авторы: Makeev Alexander, Lebedeva Marina, Kaganova Alexandra, Rusakov Alexey, Kust Pavel, Romanis Tatiana, Yanina Tamara, Kurbanov Redzhep
Журнал: Quaternary International
Том: 590
Год издания: 2021
Издательство: Pergamon Press Ltd.
Местоположение издательства: United Kingdom
Первая страница: 164
Последняя страница: 180
DOI: 10.1016/j.quaint.2021.03.015
Аннотация: Srednaya Akhtuba outcrop provides a detailed record of the Late Pleistocene continental and marine depositsand paleosols from MIS5 to MIS1. The MIS5 chronozone is presented by a continuous pedosedimentarysequence with three well-developed paleosols. The paper is based on the study of depositional environmentand pedostratigraphy, with OSL chronological framework and precise altitude references. Field dataare supported by chemical analyses, micromorphology, and clay mineralogy. A detailed study of MIS5 paleosolswas first conducted for the Lower Volga area. Pedosedimentary sequence at that time developed on theriver terrace in a backswamp and/or wetland influenced by extremely slow-moving stream after long seasonalfloods. Thin loess layers were deposited during the brief episodes of low flood activity, while fluvialheavy loams – at the time of more intensive flooding. Mollic Gleysols and Fluvic Chernozems have beenformed in the arid or semi-arid climate with seasonal freezing under productive wet meadows. Changes inthe depositional environment resulted in the formation of welded paleosols, marked by textural difference,cryogenic levels, and accretionary humus horizons. Despite the complicated depositional pattern and theinfluence of seasonal floods, the MIS5 pedosedimentary sequence may serve as a good stratigraphic markerfor the onset of Late Pleistocene allowing correlation with loess-paleosol sequences of the whole Ponto-Caspian region and linking it with the global stratigraphic schemes.
Добавил в систему: Макеев Александр Олегович

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Pedosedimentary environments in the Caspian Lowland during MIS5 (Srednaya Akhtuba reference section, Russia)статья

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