Neotectonic re-formation of the river drainage at the western margin of the Khentei-Dauria mega-arch, Mongolia

Abstract

The alluvial gravel of the ancient valley of the Tola River overlapped by Pliocene red clays and Quaternary proluvial and lacustrine deposits has been revealed within the chain of depressions, e. g. Dzamar Tselin, Tszokhoy. The depressions were formed as a result of neotectonic shifts in blocks which damrned the river and created a chain of lakes. The present-day river network came into being at fer the lakes had been drained.