In the overlap part of the right side of two main faults, the left-lateral strike-slip movement of them in Quaternary has formed the embryonic rhombochasm.

• 在两条主要左行走滑断裂的右侧叠覆区，两条主断裂第四纪的左行走滑运动产生一个胚胎期的菱形断陷。