首次报道了山东省青州地区尧王山剖面的寒武 奥陶系界线地层的牙形石生物地层学的最新研究成果,在该剖面的炒米店组灰岩建立了 9个牙形石带,其中下奥陶统为 3个带,上寒武统凤山阶为 6个带;并与国内外研究较详细的寒武 奥陶系界线地层进行了对比。在该剖面首次发现了界线牙形石分子Iapetognathusfluctivagus,这也是在整个华北地区的首次报道,这一发现为山东地区乃至整个华北地区的寒武 奥陶系的界线划分提供了新的标尺。

A new study on conodont biostratigraphy of Cambrian-Ordovician boundary in Yaowangshan Section, Qingzhou area, Shandong Province is first reported in this paper. 9 conodont zones have been recognized in the Chaomidian limestone formation, among which 3 are from the Lower Ordovician and 6 from the Fengshanian Stage of upper Upper Cambrian. The first discovery of the Cambrian-Ordovician Boundary species Iapetognathus fluctivagus in this section is of great significance. It will provide a new rule for Cambrian-Ordovician Boundary study in the Shandong area as well as in the whole North China. Additionally, through the further detailed study, the well-developed Yaowangshan Section will probably become the stratotype section in China, which will deeply affect the establishment of Cambrian stages, a still uncompleted work so far.

Q915.813