The Positions of the Channels of the Volga Paleodelta at the End of the Khvalynian Time According to Geomorphological Data

Lobacheva, D.M.; Badyukova, E.N.; Makshaev, R.R.

Авторы: Lobacheva D.M., Badyukova E.N., Makshaev R.R.
Журнал: Arid Ecosystems
Том: 29
Номер: 3
Год издания: 2023
Издательство: Pleiades Publishing, Ltd
Местоположение издательства: Road Town, United Kingdom
Первая страница: 15
Последняя страница: 23
DOI: 10.1134/S2079096123030071
Аннотация: Many geological sections along the Lower Volga valley have been actively studied since the end ofthe 19th century. The results of field work showed that in all the studied Quaternary sections along the LowerVolga valley, alluvial deposits of the Khvalynian time (the end of the Late Pleistocene) are absent. Geomorphological mapping was carried out and many outcrops along the Volga valley and on the Baer knolls werestudied. In the Khvalynian time, the Volga most likely did not flow in its present position. The purpose of thisarticle was to determine the locations of the paleochannels of the Volga on the basis of geomorphologicaldata, in particular, the spatial location and morphology of the Baer knolls. A large multi-branched delta(about 200–210-km wide), probably similar in size to the modern Lena delta, was located significantly to thenorth of the modern one. The delta existed in the form of a series of small and large branches; on the site ofthe modern Volga-Akhtuba there was probably a small central branch, the Sarpa branch was located in thewest, and the Elton-Khaki branch was located in the east. At the beginning of the Holocene, the Sarpa andKhaksky branches began to die off, and most of the water began to rush along the central branch, forming themodern Volga-Akhtuba valley. The Sarpa-Davan channel system continued to be active in the period afterthe formation of the Baer knoll complex, that is, at the beginning of the Holocene during the Mangyshlakregression.
Добавил в систему: Лобачева Дарья Макcимовна

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The Positions of the Channels of the Volga Paleodelta at the End of the Khvalynian Time According to Geomorphological Dataстатья

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