According to evolutionary periods of paleokarst, three maps are drawn: Ordovician stratum thickness map, Pre-carboniferous karst landform and Ordovician top structure maps of Ordos Basin.

• 根据古岩溶的演化期次，分别编制了奥陶系地层厚度图、前石炭纪岩溶古地貌图及奥陶系顶面构造图。