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一、前言碑坝地区位于川陕交界。解放后在本区进行了大量的地质工作。1966—1970年陕西区调队和四川第二区调队在本区进行了1:20万区调工作,对晚前寒武纪地层自下而上划分为铁船山组、麻窝子组和上两组,统称火地垭群。1974年成都地质学院李建林老师带领学生在铁船山以西任家河一带实习时,首次在铁船山组顶部发现藻类化石,以及下伏地层的微品灰质白云岩砾石,提出铁船山组新于上两组和
I. Introduction Monument dam area is located in the junction of Sichuan and Shaanxi. After the liberation in the region conducted a lot of geological work. From 1966 to 1970, Shaanxi Regiment and Sichuan No.2 Regiment made a 1: 200000 regional adjustment work in this area. The late Precambrian stratigraphy was divided into Tiefushan formation, Maowozi formation and On the two groups, collectively known as the Huaiya group. When Li Jianlin from Chengdu Geology College led the students to practice in Renjiahe west of Tieshuanshan Mountain in 1974, algae fossils and micro-grained dolomite gravels were found for the first time in Tiefushan Formation, Group and