Endogenous factor and morphogenetic structure of soils in the zone affected by Kuchiger gidroterms (Baikal rift zone, north of the Barguzin basin)

Soil cover in the zones of tectonic faults and thermal water discharge of the north of Barguzin basin there is characterized by extremely high dynamics of formation. Ascending gas-hydrothermal fluids cause changes of surface (bumps, small mounds, ridges, wave-like uplifts), soil profile turbation with a contrasting combination of pH and particle size distribution, salinization. In all soil sections there are morphological formations in the form of impregnated (bitumen-rich) layers, interlayers, spots, vertical or horizontal stripes. The most lithified horizons are viscoelastic, viscous. When wet, they have a black color (Gley1 2.5 / N), sticky, highly plastic consistency close to the plasticine, when dried very dense. A significant restructuring of the morphological characteristics allows us to to identify untypical for background soils impregnated, turbocharged subtypes of alluvial soils.