Special features of morphostructure of young platformian plains of the USSR

Abstract

A morphostructural analysis of three young platformian plains (i. e. West-Siberian, Turanian and Scythian ones) revealed besides a certain similarities also considerable differences. The West-Siberian and Turanian plains have relatively elongated Outer morphostructural belt, relatively low inner morphostructural area, the two units differing essentially in the sets of morphostructures. The Scythian platform has different structure, the mentioned Outer and Inner areas lacking there. We consider the differences in the surface topography and morphostructures of those plains to result from their position within regional (in Eurasian continent) and global systems of geotectures, the morphostructural plan of the platformian plains was also significantly influenced by development of adjacent orogens differing in age and also (which is more important) in activity.