一、前言“龙山系”一词是朱庭祐1928年所创,三十多年来,“龙山系”一词一直被用来作为广西、广东、湖南、江西等省分布很广的前泥盆纪地层的统称。但是长期以来,在这套浅变质的砂岩、页岩互层的岩石建造中,没 I. Preface The term “Longshan line” was invented by Zhu Tingyou in 1928. For more than thirty years, the term “Longshan line” has been used as a pre-Devonian, widely distributed in Guangxi, Guangdong, Hunan and Jiangxi provinces. Stratum collectively. But for a long time, in this set of shallow metamorphic sandstone shale interbedded rock construction, no