贺兰山胡芦司太,古生代地层出露良好,构造简单,笔者除将二迭纪地层作一报导外,还将上石盒子组中火山碎屑岩的发现作一介绍。本文所附化石资料部分由笔者鉴定外,皆承中国科学院南京地质古生物研究所李星学同志鉴定。岩矿标本经原西北地质局宁夏综合地质队实验室作了详细的镜下鉴定。 Helunshan Mount Lulu too, the Paleozoic strata exposed well, simple structure, the author in addition to the Permian strata made a report, but also the discovery of pyroclastic rocks in the Shek Shi box subgroup. The fossil data attached to this article is partly verified by the author. All are appraised by Comrade Li Xingxue from the Institute of Geology and Palaeontology, Chinese Academy of Sciences. Rock and mine specimens by the original Northwest Geological Bureau of Ningxia comprehensive geology team laboratory made a detailed microscopic identification.