Abstract: The study of Mesozoic fossils and volcanic rocks in Shandong shows that there are both Jurassic and Cretaceous strata n the west of Yishu fracture zone (including areas of southwest, central and north Shandong), while only Cretaceous strata in the east of this zone (namely, east Shandong). The authors consider that the Fangzi Formation belongs to the Lower to Middle Jurassic, the Santai Formation to Middle Jurassic, the Fenshuiling Formation to Upper Jurassic, the Laiyang, Qingshan and Xiwa Formations to Lower Cretaceous, and the Wangshi Formation to Upper Cretaceous. The authors abolish the Mengyin Group (Formation) and the Wennan Sub-formation, and suggest that the “Wangshi Formation” used in north Shandong should be abolished and a new name should be established.