Middle Pleistocene valleys of the intermontane basins of the Central Tien-Shan

Abstract

Large-scale geomorphological studies in the Central Tien-Shan were aimed for searches for mineral placers. The data obtained permitted to reconstruct former river valleys and condition of their evolution since the Middle Pleistocene. Two types of ancient valleys are distinguished: uplifted (most widespread type) and buried valleys (of limited distribution). Each type is subdivided into subtypes on the basis of the position of fossil valley floor with respect to recent ones, and their outlines. The data obtained facilitates search for placers in the tectonically active mountains.