论文部分内容阅读
吉林省中部明城、吉昌、土顶子、石溪河一带石炭纪地层发育,动植物化石丰富,为探讨中、下石炭统的分界提供了方便。它们的研究历史可远溯到本世纪三十年代,但是其中有植物化石的发现是在五十年代末,而利用它们来研究地层的时代和对比则至今尚未见到论著。吉中地区石炭系层序(表1)是长春地质学院师生自1959年以来建立的。在此之前日人凑正雄(1942)把鹿圈
The Lower Carboniferous strata in the Mingcheng, Jichang, Todingzi and Shixi rivers in central Jilin Province are well developed and rich in fossils of animals and plants, providing a convenient way to explore the boundary between the Middle and Lower Carboniferous. Their research history can be traced back to the 1930s, but the discovery of plant fossils was in the late fifties. The time and contrast of using them to study stratigraphy have not yet been discussed. The sequence of Carboniferous in the Middle Jizhong area (Table 1) was established by teachers and students of Changchun Geological Institute since 1959. Prior to this day, Koichi Masao (1942) deer ring