湘中、赣北、皖南地区的二叠系,经当地地质工作者多年研究,自西南向东北,大致以武冈、新化、株州一万载、南昌一青阳、繁昌(呈近∽形)一线为界,可分为南,北两种沉积类型。南型之龙潭组,据其含煤情况,又分为下部不含煤段和上部含煤段。煤系颇厚,煤层较多,它直覆于当冲、鸣山、孤峰组硅质岩之上。北型煤系则假整合于茅口组灰岩之上,其特点是厚度薄,煤层 The Permian in central Hunan, southern Jiangxi and southern Anhui has been studied by many local geologists for many years. From southwest to northeast, they are roughly named Wugang, Xinhua, Zhuzhou Wanzai, Nanchang-Qingyang, Fanchang ) Line for the community, can be divided into two types of sedimentary South and North. Longtan group south type, according to the coal situation, is divided into the lower part of the non-coal and coal-bearing section. Coal is quite thick coal seam more, it is straight over when the red, mingshan, solitary group of silical rocks above. The northern coal system is falsely integrated with Maokou limestone, which is characterized by thin thickness and coal seam