2015-№2(47) Article 11

V.A. Krivtsov, A.Yu. Vorobyev

The evolution of the terraces above the main-stem Oka floodplains: the past and the present. P.102-116.

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UDC 631.4:551.4

 

The southern part of Meshchera Lowland, lying between the Tsna river to the Gus River and covering an area of approximately 40 km., is an alluvial plain with terraces and levees. The terraces, which occur at as many as three levels: at 10–12, 18–20, 25–30 m above the modern stream bed (100–110, 115–117, 118–125 m above sea level), were formed during the Moscow glaciation (the third terrace) and the Valdai glaciation (the first and the second terraces) by fluvial and cryogenic processes. During the Holocene the evolution of Valdai terraces depended mostly on peat deposits that filled kettles, depressions and hollows of various genesis. Since the mid — 19th century the evolution of the first and the second fluvial terraces has been caused by anthropological morphogenesis, which brought about erosion of soil accompanied by underground water level recession and the cessation of peat accumulation.


The Oka Valley, fluvial terraces, relief formation

 

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