A preliminary approach on the 3D presentation and quantitative analysis of planation surface;

This paper reviews for and comments on the current advance of overseas research on neotectonics in terms of four aspects: interaction between tectonics, surface erosion processes, and climate in orogens, interaction between rift segments in continental rift zones, transverse drainages, and planation surfaces.

By classical theory of “tectonics-erosion cycles”,planation surfaces are the final products of geomorphologic evolution after long-term exogenic processes under stable tectonic conditions.

A freezing planation mechanism is proposed to explain formation of the plateau surfaces and the Northwest Si- chuan Plateau is freezing planation geomorphology,which is formed undertectonic uplift conditions in a large area.