Section

Physical geography and biogeography, soil geography and landscape geochemistry

Title

STRUCTURAL-TECTONIC AND GEOMORPHOLOGICAL CONNECTION OF SALINE-DOME MORPHOLOGICAL STRUCTURES OF THE ORENBURG CIS-URALS

Сontributors

V. P. Petrishchev, Head of the Department of the City Inventory, Orenburg State University, This email address is being protected from spambots. You need JavaScript enabled to view it.;

Head of the Laboratory of Geoecology and Landscape planning, Institute of the Steppe, UB RAS, This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract

The peculiarities of hydrochloric tectonics influence on the relief in the Orenburg Cis-Urals are considered in the article. Saline-dome morphostructures of various types act as the main form of the geomorphological manifestation of hydrochloric tectonics in the Urals. The correlation between the depth of the bedding of the evaporite layer, the amplitude of the saline uplifts, the thickness of the suprasalt deposits, on the one hand, and the mean and relative height of the surface, on the other hand, are significantly different for the leading tectonic zones of the Urals — the Ural anticline, the Volga-Ural anteclise and the onboard zone of the Caspian Depression. Of particular importance is the direct correlation in the zones of joints of tectonic zones with each other. Negative correlation is noted in the areas of reversed morphostructures — within the disjunctive synclines in the central part of the Predural trough. The manifestation of hydrochloric tectonics in the relief also affects the activity and diversity of the forms of exogenous processes, on lithogenic diversity and the degree of dissection of the surface. It is noted that the higher the degree of lithological dissection of the surface over the salt structure, the more contrasting the resistance to weathering of interbedded rocks and the more intensive the formation of the reversed relief are. The preservation of a flat relief, on the contrary, is facilitated by the lithological uniformity of the surface, composed of rocks that are approximately equally resistant against destruction and erosion.

Keywords

соляная тектоника, морфоструктура, корреляция, амплитуда, эвапориты, экзогенные процессы.

References

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