The stratigraphic sequence of the Jiaonansubregion includes the upper Archaean Dashangou lithologic formation,the lower Pro-terozoic Jiaonan lithologic group and the Pengheshi formation of the sinian system.

• 胶南地层小区层（岩）序为：晚太古代大山沟岩组，早元古代胶南岩群，震旦系朋河石组。