Chaoyang slope is a typical landslide

which is composed of gentle inclined argillaceous sandstone. By investigation of the slope

its engineering geologic conditions

buried weak layers

gullies’ relationships

strength parameters and the development of fractures are acquired and analyzed. Based on the knowledge of landslides of red sandstones

residents on it can remove to safety place before the onset of the landslide; and then heavy accident can be avoided. The intrinsic factors of red sandstones’ landslides are buried weak layers and the formation of their free faces; and the external course is the decrease of shear strength due to the heavy rainfalls. Chaoyang slope is a good example of landslides; and its analyses should be useful for any workers related to landslides.