Strata in Shandong province mainly belong to Jinjiluyu stratigraphic region of North China region. It is further divided into three stratigraphic division, they are North China plain, western Shandong and eastern Shandong. Pingdao, Dashandao and Cheniushandao in Rizhao city in southeast waters belong to Lianyungang straigraphic division of Yangtze stratigraphic region of South China Stratigraphic Province. Rock formation is divided into 27 (rock) group, 120 (rock) formation, 12 formal members, and a considerable number of informal members. iIts chronostratigraphic is divided into 57 bands. Ordovician Donghuangshan group, Bei'anzhuang group, Tuyu group, Wuyangshan group, Gezhuang group and Badou group have been recovered and classified into Majiagou formation; Permian Heishan group, Wansha group, Kuishan group and Xiaofuhe group have been recovered and classified into Shihezi formation; and Ordovician Liangjiashan formation has been distiguished in Qingzhou—Linqu area. Geological code names will comply with the latest national standards and industry standards in principle.