山东淄博地区早二叠世地层

<正> 山东淄博含煤盆地大地构造单元属泰山—沂山隆起的北缘,二叠纪地层发育,剖面完整,植物化石丰富。 1.淄博市博山区八陡镇东黑山山西组和下石盒子组剖面 剖面位于八陡镇北约500m处北大沟。 上覆地层 上石盒子组(P1/2)灰、灰绿、紫色等杂色泥岩

The Early Permian stratigraphy of the Zibo area of Shandong

The Early Permian strata are well developed in the Zibo area, Shandong Province. The characteristics and sedimentary types of these strata are similar to those of the same period in North China. This paper applies research methods of biostratigraphy, ecostratigraphy, sedimentology and geochemistry to make a comprehensive analysis on Early Permian strata in the Zibo area. In this paper, Early Permian flora may be subdivided into two plant assemblages in ascending order: early Early Permian Lobatannularia sinensis-Taeniopteris mu-cronata Assemblage and late Early Permian Emplectopteris trangularis-Plagiozamites oblongi-folius Assemblage, in addition, three plant communities are recognized accordingto life habits and habitats of different plants, namely: early Early Permian Lepidodendron oculus-felis Community and Lobatannularia sinensis Community, and late Early Permian Pecopteris taiyuanensis Community. Based on the study of rock types, fossil plants and sedimentary environments, this paper discusses the characteristics, ages and boundaries of the Early Permian strata in this area.