湖南湘潭仙女山区,虽经过许多地质调查,却从未发现奥陶纪地层。1963年5月,笔者于仙女山北水井钟鼓山发现下寒武统底都的结核状磷矿层超复于南沱冰碛岩之上。同年8至11月间,我队区域小组,在本区的牛头大岭、水井蚌塘和梁山桥等处,于所谓的“上震旦统”的上部,采得了笔石化石。同年12月,笔者与钟政连前往上述三处进 Xianmushan Mountain in Hunan Province, though after many geological surveys, has never discovered Ordovician strata. In 1963 May, the author found in the fairy mountain north of Zhongguanshan Karst bottom of the Cambrian phosphate rock overlying the moraine above the Nantuo. In the same year, from August to November, our team of regional groups took pen petrified fossils in the upper part of the so-called “Upper Sinian” in the Tau Tau Oaling, Mantang Well and Liangshan Bridge in this area. In December the same year, the author and Zhong Zhenglian went to the above three into