Dilivium is a geological term. The rocks formed by the slow and steady accumulation of clay and similar alluviums carried by the flood and flood waters during the surface flow. This term was given to the rock clay layers, which were thought to be caused by the flood of Noah. At the end of the 20th century, the Russian geographer Alexei Rudoy proposed the term dilivium for the definition of layers formed as a result of catastrophic eruptions of the glacial dam lakes of the Ice Age in the Altai mountains. The largest of these lakes, Chuya and the Qur'an, had a volume of hundreds of kilometers of water, and their peak hydrographic flow rate evacuation exceeded the maximum rates of the famous Pleistocene Lake Missoula flood in North America.

Almost all inter-mountain sediments in southern Siberia and northern Mongolia have been home to glacial reservoirs during the Pleistocene Ice Age. Climate changes and hydrostatic changes of ice dams have been followed by repeated evacuation and fillings of basin lakes. The lakes have a flood character. In accordance with climatic conditions, glaciers will flow back into the main drainage valleys again after dam deformations and lake floods, and basins will become dams. While the floods have reached millions of cubic meters per second, the largest of the lakes (Chuya, Kuray, Darkhat and other lakes) has reached up to hundreds of cubic meters. This flood has been transformed into drainage valleys by building new sedimentary beds. These events prove the formation of large-scale floods in the Chuya and Katun River valleys 23-7 thousand years ago. At that time there were at least five large-scale floods. Massive water bodies were emptied at the same time and repeatedly to the south of Western Siberia. The total water volume outside the Altai basins can only reach 10 thousand kilometers. In some periods, all of the basins of South Siberia were able to transmit about 60 thousand cubic meters of water to the North.

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