根据地层发育程度和沉积特征,以萍乡—广丰深断裂和三南—寻乌深断裂为界,江西及广东北部中生代晚期可划分为北、中、南三个地层区。根据不整合面和岩石组合特征,以群级岩石地层单位与火山旋回或沉积旋回相对应为原则,北区可划分出火把山群和圭峰群,中区可划分出武夷群、罗塘群或版石群和圭峰群,南区可划分出余田群、版石群或罗塘群。根据岩性岩相特征,以组级岩石地层单位与复合岩相或沉积岩相相对应为原则,余田群可划分为水头迳组和菖蒲组,武夷群划分为双峰岭组、鹅湖岭组和石溪组,版石群划分为合水组和优胜组,罗塘群划分为白埠组、周田组和邓家组,火把山群划分为丘家组、天台山组、冷水坞组和周家店组,圭峰群划分为河口组、塘边组和莲荷组。根据同位素年龄数据和化石资料,余田群的地质时代属中侏罗世;武夷群主体属晚侏罗世,顶部石溪组跨入早白垩世;罗塘群或版石群属早白垩世晚期—晚白垩世早期;火把山群属早白垩世,圭峰群属晚白垩世晚期。 According to the degree of stratigraphic development and sedimentary characteristics, the Pingxiang-Guangfeng deep fault and the Sannan-Xunwu deep fault are bounded by the boundary, and the late Mesozoic in Jiangxi and northern Guangdong can be divided into three strata of North, Central and South China. According to the features of unconformity and rock assemblage, the unit of lithospheric strata corresponds to volcanic cycle or sedimentary cycle. The northern part can be divided into torch mountain group and Guifeng group. In the middle part, Wuyi group and Luo tong group can be divided Or version of rock and Gui Feng Group, Southern District can be divided into more than Yu Tian group, version of rock group or Luo Tong group. According to lithofacies and lithofacies facies, the unit of lithostratigraphic unit corresponds to complex facies or sedimentary lithofacies. Yutian Group can be divided into Shuitou Formation and iris group, and Wuyi Group is divided into Shuangfengling Formation, And Shixi Formation. The plateaus are divided into the Heishui Formation and the Yusheng Formation. The Luotang Formation is divided into the Baibu Formation, the Zhoutian Formation and the Dengjia Formation. The Torch Mountain Group is divided into Qiujia Formation, Tiantaishan Formation and Lengshuiwu Formation And Zhoujiaodian, Gui Feng group is divided into estuary group, pond group and lotus group. According to the isotope age data and fossil data, the Yutian Group’s geologic age belongs to the Middle Jurassic; the Wuyi Group belongs to the Late Jurassic and the top Shixi Formation into the Early Cretaceous; the Luo Tong Group or the Plate Rock Group belongs to the Early Cretaceous - Early Late Cretaceous; the Torch Mountain Group belongs to the Early Cretaceous and the Guifeng Group belongs to the late Late Cretaceous.