Mamianshan Group has three generations of tectonic deformations in ascending order: recumbent fold in the deep structural level, tight similar fold and kink in the lower structural level.

• 马面山群发育三个世代的构造变形,自早而晚分别为:深构造层次平卧褶皱、浅构造层次的紧闭相似褶皱及膝折带构造。