A Study on Origin of Loess Caves in Loessal Plateau
Li Xian, Jianbing Peng, Zheng Shu-yan, Zhixin Chen, Tian An-jia · Highway · 2005
On the basis of the field survey and statistic,the causes of loess caves in the loessal plateau are studied in this paper.Result shows that the controlling causes of loess caves include the thickness of the loess layer,loess quality,structure,land form,hydrology,geology and climatic conditions, of which the loess quality,thickness of the loessal layer as well as their combinations formed the bases of loess caves.Loess caves of different depths have different main causes.The cause of superficial loess caves is related to biologic activities,of shallow layer caves to their differentiation of the anti-water erosion ability as well as the fissures inside,of middle layer caves to the fissures inside,and of deep and extra deep layer caves to the tectonic joint.