One to three karst cycles may be recognized mostly at the top of the Upper Permian strata, top of the Middle Permian Maokouan strata and top of the Carboniferous strata and subordinately at the top of the Devonian strata.

• 这些古岩溶作用主要存在于上二叠统顶部、中二叠统茅口组顶部和石炭系顶部，其次是泥盆系的顶部。