There are four types of sub-upper Permian unconformities in the Tarim basin,they are fold truncation,faulted-block-turned truncation,onlap and parallel unconformities.

• 塔里木盆地的上二叠统或中、新生界与下伏地层之间存在着不同类型的不整合,如褶皱削截(超覆)不整合、断块旋转削截超覆不整合、超覆不整合和平行不整合等。