【作者】 杨式溥； 田树刚； 郑昭昌；

【Author】 Yang Shipu Tian Shugang (Beijing Graduate School,Wuhan College of Geology) Zheng Zhaochang (Geological Institute of Ningxia)

【机构】 武汉地质学院北京研究生部； 宁夏地质研究所；

【摘要】 <正>宁夏中卫县校育川地区石炭纪纳缪尔期地层(中卫组和靖远组)属海陆交互相沉积, 富含菊石、牙形石和植物等化石,地层出露完好,是研究纳缪尔期地层的良好地区。杨逢清、郑昭昌和刘志才等(1983)曾建立了该区系统的菊石带。经系统采集,笔者详细研究了校育川剖面的纳缪尔期牙形石,分出与各菊石带相对应的五个牙形石带。各牙形石带可更多还原

【Abstract】 Namurian conodonts have been separated from Zhongwei Formation and Jingyuan Formation of Xiaoyuchuan in Ningia Huizu Autonomous Region. According to the evolutionary relations and the distribution of the cono- donts,five conodont zones have been recognized.1)Gnathodus bilineatus bi- lineatus zone,2) G.bilineatus bollandensis zone,3) Neognathodus symmetricus- Idiognathoides sinuatus zone,4) Idiognathoides attenuatus zone and 5)Declin- ognathodus parvus zone.These zones can be correlated with the ammonoid zones in this area and the conodont zones of Guizhou Province and Western Europe.更多还原