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桂西北、黔南一带下二叠统下部的地层划分,前人己进行了许多工作,先后提出了各种不同的划分方案(见表1)。《中南区区域地层表》将下二叠统下部统称“栖霞组”,代表以灰岩为主的沉积。若底部为碎屑岩,则称其为“铜矿溪段”,其上称为“灰岩段”。在贵州南部,盛金章、沈志达、地科院等则将与《中南区区域地层表》的“栖霞组”相当的地层划分出两个组:下边的厚度不大的碎屑岩称“梁山组”或“龙吟组”,上边的灰岩部分称“栖霞组”(表1)。
In the northwest of Guangxi and the south of Qiannan, the lower Permian stratigraphic division has been carried out. Many previous works have been carried out by various predecessors and different solutions have been proposed (Table 1). “Central South regional stratigraphic table” will be collectively known as the lower Permian “Qixia Formation”, on behalf of limestone-based deposition. If the bottom is clastic, it is called “copper mine brook”, which is called “limestone section.” In the south of Guizhou, Shengjin Zhang, Shen Zhida, ASTRI and so on will divide the formations equivalent to “Qixia Formation” of the “Zhongnan Area Stratigraphic Table” into two groups: the lower thick clastic rocks are called “Liangshan Formation” Or “Longyin group”, part of the above limestone “Qixia group” (Table 1).