Main stages of Post-Devonian development of West Uzbekistan relief

Abstract

The relief development at the territory under discussion is closely related to paleomorphological cycles of various order (macrocycles, mesoccycles etc.) with duration about 160-156, 83-75 and 44-37 million years. During the Late Tournai – Early Lias macrocycle base uplift occured at the area of the South Tier Shan geosyncline. In Middle Lias – Middle Oligocene the uplift was eroded and heterogeneous topography was created which was buried later on. In Neogene-Pleistocene block mountains came into being with relicts of planation surfaces and weathering crusts of Mesozoic, Cenozoic and Paleozoic age. Weathering crusts of humid lithogenesis had been formed in the beginning and final stages of mesocycles, arid lithogenesis and crust formation developing within the intervals.