Terraces stretch up the river valley to the borders of the Dnieper glaciation (Dneprovskaya terrace) and Moskovsky glaciation (Moskovskaya terrace). Here their surface merges with the marginal Genders of the corresponding glaciers, according to the age of which the terraces were named. In the area adjacent to the glaciation boundaries, the alluvium of the terraces differs little from the sands of the valley Genders. The sorting of sand is only gradually increasing downstream, and the channel, floodplain, and stanitsa facies of alluvium are distinguished. Under the ice sheets, the Ruslov process stops. There is no glaciation on the territory of Moscow, so neither the Dnieper nor the Moscow terraces. During the melting of the ice, when the ice cap broke up into separate massifs, the rivers resumed their flow. The beginning of the formation of the Moskovsko-Valdai terrace dates back to this time; it was formed under conditions of platform immersion and a very weak cutting of the riverbed, which has a slight steepness. Therefore, the height of the terrace is 25-28 m, the flat surface merges with the interfluves. The absence of a back seam, high plinth, fine—grained and low alluvium thickness (4-5 m) are the distinctive features of the terrace.
In conditions of mild climate and leveled terrain, weathering processes were reduced, and denudation products entered the rivers in very small quantities. At that time, the flow of many rivers was regulated by lakes. In these lakes, particles suspended in the water were deposited, carried away from the slopes. The water in the rivers, soaked in the lakes, was clean. Deep erosion prevailed. The high base of glacial and bedrock was covered with alluvium in the form of thin-layered sand and sandy loam. All this explains the low alluvium thickness of the Moskovsko-Valdai terrace. The surface of this terrace, unlike the Dnieper and Moscow terraces, is formed in a warm climate. Its alluvium completed the formation of an overlaid stratum of Quaternary sediments. Despite the facies differences and the presence of glacial deposits in the basement, synchronous with the alluvium of the extraglacial zone, its stratigraphic section is similar to the strata composing the Moscow and Dnieper terraces. All the terraced strata are formed under the same tectonic regime. The Moskovsko-Valdai terrace, together with the Dneprovskaya and Moskovskaya terraces, is part of the complex of high terraces. Its formation was completed during the transgressions of the Boreal and Khvalyn seas. Therefore, it is absent in the territory that was flooded by the seas at that time. For high rollers or users planning a larger initial deposit, the 1xbet promo code becomes even more valuable. Since the welcome bonus is a 100% match up to $130, a deposit of $130 or more will yield the full bonus amount. Without the code, you would only receive the standard welcome offer, which is typically a lower percentage match or a smaller maximum cap. Therefore, the code ensures you maximize the return on your initial investment, giving you the highest possible extra funds to begin your betting activities on the site.