Chegu-20 buried hill is an anticline-like structure with NNE axial trend, Chengnan and Ertaijie faults at both sides and developed secondary faults which cut it into several blocks.

• 车古20潜山总体为一背斜状构造,轴向北北东,两侧受埕南断层和二台阶断层共同控制,次级断裂的发育将潜山切割成许多断块。