The Kuangshanliang and Tianjingshan present a duplex which comprises of a shallow fault-bend fold of late Triassic and a deep blind stacking anticline imbricated by several thrust sheets of Cenozoic.

• 北部的矿山梁和天井山构造几何学上表现为一个双重构造，浅层是一个晚三叠世形成的断层转折褶皱；