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广西东部广泛发育一套厚度甚大的早古生代浅度变质岩系,过去泛称为龙山系。1958年,赵金科、张文佑发表了广西地质一文,将兴安地区的奥陶系统称为溶江系,自下而上分为白洞灰岩、黄隘页岩和田岭口层三部分。1962年秋,笔者等又赴该地测制剖面、采集化石。广西地质局区测队先后在临桂五通、平南六陈、藤县赤水和桂平麻垌等地陆续发现了笔石,其中部分笔石经笔者鉴定,系代表下奥陶统下部至上奥陶统上部的不同层位。1965年,李志才报道了兴安地区奥陶系的新资料,建立了升平组。
A series of Early Paleozoic shallow metamorphic rocks widely developed in the eastern part of Guangxi have been widely used as the Longshan system in the past. In 1958, Zhao Jinke and Zhang Wenyou published a paper about the geology of Guangxi. The Ordovician system in Xingan area is called the Rongjiang system. It is divided into three parts: white cave limestone, Huangyi shale and Tianlingkou. In the autumn of 1962, the author went to the area to make profile and collect fossils. Guangxi Geological Bureau of the regional team has in Lingui five links, Pingnan Liu Chen, Chishui Chishui and Guiping Mudanjiang and other places have found a pen and stone, some of which were identified by the pen, the Department of the lower Ordovician to the upper Austria Different upper tiers of Tao. In 1965, Li Zhicai reported new information on the Ordovician in the Xing’an area and established the Shengping Formation.