中文摘要：

重庆地区位于大地构造单元上扬子台地的西北缘,与川南、黔北毗连。地层划分以《重庆市地质图说明书》为基础,结合相关1∶200000区调资料进行划分。上二叠统包括龙潭组/吴家坪组和长兴组,其中龙潭组和吴家坪组为同期异相沉积,大致以涪陵-大竹为界。龙潭组共分五段。其中龙潭一、三、五段为碎屑岩段,以砂泥岩为主,夹石灰岩,是主要含煤段;二、四段为灰岩段,夹泥岩。吴家坪组分两段,第一段为含煤地层。长兴组几乎全部为石灰岩。

英文摘要：

The Chongqing Municipality is situated at northwestern margin of the Upper Yangtze platform, and adjacent to southern Si- chuan and northern Guizhou. The stratigraphic unit partitioning is based on the ＂Instructions to Chongqing Municipality Geological Map＂, combined with 1：200,000 regional geological survey. The Upper Permian includes Longtan/Wujiaping and Changxing forma- tions, in which, Longtan and Wujiaping formations are synchronous heteropie deposits, roughly demarcated by Fuling--Dazhu line. The Longtan Formation can be subdivided into five members, in which, 1 st, 3rd and 5th are clastic rock members, mainly sandy mud- stone, intercalated with limestone, the main coal -bearing members; 2nd and 4th are limestone members, intercalated with mudstone. The Wujiaping Formation can be subdivided into two members; the 1 st is coal- bearing member. The Changxing Formation is almost all limestone.