FORMATION OF FLOODPLAINS IN THE LO WER REACHES OF LARGE PLAIN RIVERS UNDER BASE LEVEL FLUCTUATIONS
Abstract
The palaeogeomorphological analysis lower of Volga, Don and Kuban rivers made it possible to reconstruct the mechanism of palaeo-deltas formation in valley bays and mouth lagoons. In the valley bays (Don and Volga rivers) stage-by-stage accumulation of alluvium, development of river arms network and formation of a deltaic flood-plain took place.
Transgression-regression character of the sea level fluctuation caused partial erosion and burial of deltaic sediments under liman-marine deposits during the rising sea level followed by the full-bay delta expansion in the period of sea level lowering.
In the mouth lagoon a few-arm full-lagoon delta was initially formed, and at the stage of the total fulfillment of mouth lagoon with river deposits a deltaic plain had formed, joining the marine bloc-shit. At the final stage of full-lagoon delta formation the arms went out to the open mouth offshore and protruding deltas were formed in their mouths.
About the Authors
V. N. Korotaev
Lomonosov Moscow State University.
Russian Federation
Faculty of Geography, the Makkaveev Research Laboratory of Soil Erosion and Fluvial Processes, Leading Scientific Researcher, D.Sc. in Geography, Senior Scientific Researcher.
Russian Federation
Faculty of Geography, the Makkaveev Research Laboratory of Soil Erosion and Fluvial Processes, Leading Scientific Researcher, D.Sc. in Geography, Senior Scientific Researcher.
A. V. Chernov
Lomonosov Moscow State University.
Russian Federation
Faculty of Geography, the Makkaveev Research Laboratory of Soil Erosion and Fluvial Processes, Leading Scientific Researcher, D.Sc. in Geography, Associate Professor.
Russian Federation
Faculty of Geography, the Makkaveev Research Laboratory of Soil Erosion and Fluvial Processes, Leading Scientific Researcher, D.Sc. in Geography, Associate Professor.
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Review
For citations:
Korotaev V.N., Chernov A.V. FORMATION OF FLOODPLAINS IN THE LO WER REACHES OF LARGE PLAIN RIVERS UNDER BASE LEVEL FLUCTUATIONS. Vestnik Moskovskogo universiteta. Seriya 5, Geografiya. 2018;(4):29-38. (In Russ.)
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