摘要
The prunosus thick-bedded and mega-thick-bedded conglomerate and sandstone conglomerate of Upper Cretaceous Chongan Formation are made up of a monocline type Danxia landform.The different caves are made up of the unique cave landscape in Danxia cliff.The development of Danxia cave is controlled the lithology and fissure and the main bed are the interlayer of gravel slitstone,sandstone and fine sandstone.The thickness,joint and fissure of rock formation control the scale of cave.The weathering denudation,rainfall erosion,gravitational collapse and river water erosion are the major external power of different caves.Formation and developemnt of the cave is often a combination of external forces results.