Cohesive soils of the Urals
The types of cohesive soils and physico-mechanical properties in all kinds of soils of the Central Urals, Main Urals, Eastern Urals and Transural regions are under consideration including eluvial, eluvial-talus, talus, alluvial, lacustrine-alluvial, lacustrine and swamp ones. All cohesive soils of the Urals are characterized by a predominance of silt fraction. Total silt components in soils exceed 40 %. Sandy loam is the leading component of the talus soils of the Main Ural and Transural regions, alluvial deposits of Transural region, with a significant role in the composition of eluvial and eluvial-diluvial deposits of the Urals. The clay fraction accumulates in the lake-swamp, alluvial and lacustrine-alluvial deposits of Transural region. Cohesive soils of quaternary deposits are of great importance in engineering-geological study of the area. They largely determine the geotechnical conditions of civil engineering structures due to their genesis, particle size and mineral composition, climatic and geomorphological conditions of the formation.