论文部分内容阅读
本文根据该地区1:20万区调成果,以广南县那达——板内剖面和邱北县羊七沟剖面为基准,将该区的一套浅海——半深海碎屑岩相中三叠世地层,划分为两个组(上面的羊七沟组,下面的那达组)、四个菊石组合、三个瓣鳃组合。认为那达组时代属安尼期,而羊七沟组属拉丁期地层。本区中三叠统较相邻的桂西、黔南地区出露得更较完整,化石更为丰富,而且与碳酸盐相地层的相变现象反映得更为清晰,是研究中三叠统及生物组合的理想地区。
According to the results of 1: 200000 regional adjustment in this area, based on the Nada-Ban plate section in Guangnan County and the section of Yangqidougou in Qiu Bei County, a set of shallow sea-half deep sea clastic facies The Triassic strata are divided into two groups (Yanggougou Formation above, Nadagam below), four combinations of ammonites, and three flap gills. It is believed that the age group that Anita period, while the sheep Qidou formation of Latin strata. The Triassic in this area is more complete than the adjacent areas in western Guangxi and southern Guizhou, with more abundant fossils and more clear phase transition with the carbonate phase strata. The ideal combination of biological and biological areas.