The red bed is a elastic sedimentary rock mainly deposit by red continental sedimentation, the rock property is mainly composed by sandstone, mudstone, siltstone and arenaceous shale.

• 摘要红层是红色陆相沉积为主的碎屑沉积岩层，岩性以砂岩、泥岩、粉砂岩和页岩为主。该类岩层多为软岩与硬岩相间，呈互层状产出，层间结合力弱。