1981年9月至1982年4月,我们随广西大瑶山综合考察队对金秀瑶族自治县寒武系进行了实地考察(图1)。这里的寒武系统称为水口群(∈sh),分上、中、下亚群。 上亚群(∈sh_3)总厚为3176米,与上覆下泥盆统莲花山组为不整合接触,按岩性分为三个组:1.上组为粉砂岩夹细粒石英杂砂岩、砂质泥岩, From September 1981 to April 1982, we conducted a field visit to the Cambrian Department of Jinxiu Yao Autonomous County with the comprehensive inspection team of Dayaoshan in Guangxi (Figure 1). The Cambrian system here is called a nozzle group (∈ sh), divided into upper, middle and lower subgroups. The upper subgroup (∈ sh_3) has a total thickness of 3176 meters, which is unconformable with the overlying Upper Devonian Lianhuashan Formation and divided into three groups according to lithology: 1. The upper group is composed of siltstone fine-grained quartz sandstone , Sandy mudstone,