Unveiling the enigma of the Upper Volga River valley based on the soilscape studies

Makeev, A.; Rusakov, A.; Lebedeva, M.; Karpukhina, N.; Konstantinov, E.; Frechen, M.; Kust, P.

Авторы: Makeev Alexander, Rusakov Alexey, Lebedeva Marina, Karpukhina Natalia, Konstantinov Evgeniy, Frechen Manfred, Kust Pavel
Журнал: Catena
Том: 246
Год издания: 2024
Издательство: CATENA Verlag
Местоположение издательства: Germany
Первая страница: 1
Последняя страница: 19
Номер статьи: 108431
DOI: 10.1016/j.catena.2024.108431
Аннотация: The morphology, age, and genesis of the river valleys within the area of Quaternary ice sheets is still a matter ofdebate despite their long study history. In the upper reaches, the Volga River flows across the Moscow (LateSaalian, MIS 6) glacial area and, like other rivers in the glacial areas, was deeply influenced by the glacier. Twobedrock steps within the valley, its slopes, and adjacent uplands are covered with a uniform mantle of bipartitesediments left by the Moscow glacier. This indicates that the ancient valley was buried by a glacier and no floodterraces formed. The paper provides the first systematic study of soils in bipartite sediments across the UpperVolga River valley, including depositional environments, pedostratigraphy, and a more reliable chronologicalframework by luminescence dating and altitude references. Field investigation is supported by micromorphology,grain size distribution, and chemical properties. Soil horizons formed in the glacial till exhibit featuressimilar to those in bipartite soils on the uplands. These include those acquired prior to deposition and thoserelated to pedogenesis and frost impact from the Last Interglacial to the present. In contrast, the cover layer ofsoils within the river valley differs from the upland soils, being reworked by aeolian processes in the Late Glacialenvironment (17.5–12.4 ka). Its thickness varies with topographic position, reflecting the intensity of aeoliansedimentation. Argic horizons of soils buried by a thick layer of silty sand in the Late Glacial are similar to thoseof unburied soils, providing the first direct indication that these properties were largely formed during the LastInterglacial. The mantle distribution of soils in bipartite sediments confirms that the topography of the study arearepresents a relic glacial relief of Moscow (Late Saalian, MIS 6) time.
Добавил в систему: Макеев Александр Олегович

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