Southern Marginal Fault of the Yardang Geoarea

Located in the southwestern edge of the Yardang geoarea, the fault belongs to the tectonic compression category (figure 4-1316). The strike of the fault is west and east while the inclination direction is northwest. The broken zone is about 3.5 m wide, and the occurrence is 350°∠70°. Rupture in the surface is evident, forming a 5 m high fault scarp, on which there are fault surface breccia and fault gouge. The fault surface breccia is yellow and well cemented. The debris is in angular and sub-rounded shape, with their size uneven.

Figure 4-16 the fault in the south edge of the Yardang geoarea