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中村地区银花河南的寒武系,在地层上属南秦岭分区,留坝一白河小区(据1980,1∶50万陕西省地质图)。这一带出露的寒武系呈近东西向窄条带状展布。向东连续出露,直到河南西峡、淅川、湖北郧西一带;向西断续出露至宁陕东江口一带。与下伏上震旦统灯影组为假整合接触;与上覆下奥陶统水田河组连续沉积。本区寒武系的研究工作自三十年代就开始了,到一九八四年四月止,在下寒武统中发现了不少化石,计有:Redlichia noetling,Dedlichia sp.,Kootenia yui,Palaeolenus douvillei,Bergeroneillus houchouensis,Cobbolelis sp.,Obolus asiatica,
Yinchuan in the middle of the Cambrian area in Henan, in the strata belong to the South Qinling subregion, leaving dam a Bahe area (1980,1,500,000 Shaanxi Province geological map). Cambodian exposed in this area was nearly east-west strip distribution. Continuous exposure to the east, until Xixia, Xichuan, Hubei Yunxi area; west intermittent exposure to the Ningjiang Dongjiangkou area. And the underlying Upper Sinian Dengying Formation is a fake integrated contact with the Lower Member of the Ordovician paddy river continuous deposition. Since the 1930’s, the Cambrian research work in this area started. Until April 1984, many fossils were found in the Lower Cambrian, including Redlichia noetling, Dedlichia sp., Kootenia yui, Palaeolenus douvillei, Bergeroneillus houchouensis, Cobbolelis sp., Obolus asiatica,