Because of the frequently faulting, the basin is characterized by familiar destructional benchs, torrential deltas and chutes, and the paleoriver diverted commonly.

• 由于断裂构造的频繁活动，使区内侵蚀阶地发育、洪积扇裙遍布山前、冲沟裂点发育、河流频繁变迁改道、岩相厚度纵横变化明显。