Home – Home – Jornals – Geography and Natural Resources 2020 number 4

Presented are the results of observations of instantaneous exogenous transformations, i.e. funnel-shaped depressions in ter restrial surface occurring in areas of occurrence of readily soluble deposits. The surface and underground karst forms at the border of the East-European Platform and the Pre-Ural Trough as well as along the slopes of the northern end of the Ufa Plateau within Perm krai are objects of monitoring observations conducted by the Kungur inpatient laboratory since 1952. Mor phometric indicators of karst dips and sinkholes are presented. The special features in their distribution are considered depend ing on topographic elements. Areal and temporal quantitative indicators of the formation of collapse phenomena are presented by using the Lower Sylva karst region as an example. The role of fossil reef structures in the initiation of karstic processes in the carbonate-sulfate strata of the Kungur stage of the Permian system in the lower reaches of the Sylva river (tributary of the Chusovaya river) is determined. It was found that the concentration of the movement of groundwater of local aquifers in the draping structures not only from above but also from below and from the side with respect to the sulfate layer accelerates the dissolution processes of sulfate rocks located at a small distance along the contour of the fossil reef. An increase in the role of anthropogenic impact in the development of hazardous geological processes: karst and karst-suffusion dips, in urbanized areas is observed. The formation of recurring collapses on the initial site even in the case of measures taken to eliminate them is re corded. The special features of the development of multiple dips above the grottoes of Zuyatskaya cave are considered.