Mesozoic-cenozoic Division And Contrast Of The West Shandong Province

The use of Hthostratigraphic units to the west Shandong province stratigraphic subregion is very chaotic because different researchers establishes and uses different Hthostratigraphic units in different time. Tertiary period basin group lies approximately parallel arrangement along east and west. It is difficult for studying work because Stratigraphic unit's division has the very great dispute to this area. This article discusses lithostratigraphic units of Mesozoic Era, Cainozoic era to the west Shandong province and then proposes a new division scheme. It is suggested that use Fangzi formation, Santai formation, Mengyin formation, Xiwa formation, Gucheng formation, abate "Wennan formation (sub-formation) ", "Fenshuiling formation (sub-formation) " and does not use some lithostratigraphic units in the west Shandong province, such as "Yanggezhuang formation", "Qugezhuang formation", "Bamudi formation" and so on. Guanzhuang group is suggested to be adopted in Tertiary era according to sedimentary characteristic and the distribution of strata, Cainozoic era. Guanzhuang group includes Gucheng formation, Bianqiao formation, Changlu formation, Zhujiagou formation and Dawenkou formation from bottom to top. After the research of mammal, ostracoda, chareae, gastropod, palynologic fossil and so on, Guanzhuang group pertains Paleocene epoch to early Oligocene epoch, Gucheng formation pertains late Cretaceous, Bianqiao formation pertains early Paleocene epoch, Changlu formation pertains middle-late Paleocene epoch to early Eocene epoch, Zhujiagou formation pertains early Eocene epoch, Dawenkou formation pertains middle Eocene epoch. Well strata of overlay area are redivided and the strata are contrasted of overlay area and outcrop area, using the new division scheme. Finally Mesozoic Era, Cainozoic era strata distributed characteristic is summarized to the west Shandongprovince and this research has laid the foundation.