Ta-hsüeh Mountains

Wade–Giles romanization  Ta-hsüeh Shan,  Pinyin  Daxue Shan,  also called  Szechwanese Alps, or Sino-tibetan Chain,   great mountain range in the west of Szechwan province, China. These enormously high and rugged mountain chains were formed around the eastern flank of the ancient stable block of the Tibetan Plateau; their formation occurred during successive foldings that took place in the final phase of the Jurassic mountain-building process, as well as during the Cretaceous