Block faulting activities inside basin develops, forming NE and NW fracture systems, thus cutting this basin into 47 tilted block faulting body and a series of overlying dustpan-like fault depression.
It is possible that active stretch block in an extensional basin can be distinguished according to its plane appearance of structures.
由此可见，可能借助伸展盆地的断层平面变形面貌判别主动分离块体。
3
Zengmu basin is a peripheral foreland basin, formed from southern subduction of Nansha Block and gentle collision with Borneo Block, and experienced four stages of tectonic evolution.