广西那坡县三叉河泥盆系剖面,位于那坡至靖西公路线的三叉河至平恩村,西北距那坡县城33公里,东南距靖西安德13公里。剖面所通过的岩层是其间一个古喀斯特溶洞陷落后的南缘(图1)。为了补充坡脚组和达莲塘组的接触关系,我们在剖面附近的照阳水库东侧,补测了一段坡脚组顶部和达莲塘组底部的剖面(图2)。综合上述二个剖面,其层序如下(图3)。 Guangxi Triassic Devonian profile, located in that slope to Jingxi highway tri-Fork River to Ping Village, northwest from Napo County 33 km, southeast of Jingxi Ande 13 km. The formation through which the section passes is the southern margin of the collapse of an ancient karst cave (Figure 1). In order to supplement the contact relationship between the slope footing group and the Daruotang formation, a section of the top of the slope footing group and the bottom part of the Daturang Formation (Figure 2) was added to the east of the Zangyang Reservoir near the profile. The above two profiles, the sequence is as follows (Figure 3).