Geomorphological expression of zonality of the recent tectonic tressed state of the Earth's crust

Abstract

Direct in-situ stress measurements in the upper earthcrust showed the existence of geostatic fields within rock stress caused by their weight and geodynamic fields with lateral tectonic stresses. The usage of gamma-metric method allows carrying out the detail study of interstate and composition of compressive stress fields and zones of postorogenic and present earthcrust dilatation.

Zonality of the tectonic stress state of the earthcrust is an important geomorphological factor. The negative landforms develop within the limits of dilatation zones which are characterized by increase in rock facility and decrease in rock solidity properties. This connection is especially well pronounced in erosive valleys. In some cases, however, the connection of valleys with dilatation zones is less distinct and there are cases of coincidence of the valleys with compression zones. Zonality of the tectonic stressed state of the earthcrust determines the intensity of the surface modelling and underground karst forms development.