摘要
在开展上海岩石地层清理工作中,对以往留存地层断代疑点的地层补做了采样、分析鉴定工作。在志留纪、奥陶纪地层中发现孢粉、牙形刺及腹足类化石,对所属地层时代的厘定起了关键作用。
While checking up Shanghai litho - stratigraphic documents, additional sampling, analyzing and identifying work have been done for former doubtful points of stratum dating. Sporopollen, conodontophorida and gasteropod fossils have been found in the strata of the silurian & Ordovician period, all these have play an important role in identifying the time of these strata.
