Faults at the fault depression boundary are featured by shovel shape and the inner ones are featured by sub-graben, horst bulge and half-graben figures.

• 凹陷不同部位断层组合形式具有明显差异，凹陷边界断层主要以铲式扇为特征，内部以次级地堑、地垒式低幅度凸起和箕状半地堑等为特征。