湘东地区分布的二迭纪地层,分为两种类型,以北纬27°30’为大致界线,以北是早二迭世的茅口组,其上的龙潭组缺少“不含煤段”,称北型;以南是当冲组,其上的龙潭组有“不含煤段”地层,称南型。这是长期以来的一种主导看法。 笔者通过在湘东地区地质工作实践中的观察,认为上述看法与实际地质情况不尽符合, The Permian strata distributed in eastern Hunan are divided into two types, roughly latitude 27 ° 30 ’north, and Early Permian Maokou Formation to the north. On the Longtan Formation there is no “non-coal-bearing segment” , Said North; South is when the red group, the Longtan group there is “non-coal-bearing” strata, said South. This is a dominant long-held view. Through the observation of geological work in the eastern part of Xiangtan, the author thinks that the above views are not consistent with the actual geological conditions,