Geological Division of the Upper Palaeozoic Gronp in Tafutou, Kaiping province in North China

There is a thick coal measure (360mm in thickness) underground in the area of Tafutou, Kaiping, Lansien, Hopei Province, in North China. The data of this paper are the result of the borring survey by the S. M. R. Co. Geological Survey Department in 1942. The coal measure was divided into 4 groups, consisting of the Upper, Middle, Lower, Lowermost group. Proceeding 2 ones belong to the lower permian Rothliegende Series, the next one to the Sakmarian stage, last one to the Moscovian stage. Each ones was correlated to the Schihotze series, the upper Yuemenkou series, the lower Yuemenkou series, and the Penchi series in North China. The lowermost Penchi series represents one cycle of the succesive sedimentation, and lacks the Uralian Stage on it. This fact does not mean the land surface denudation after the Uralian sedimentation, but the interruption of sedimentation during the quiet Uralian regression time. In this reason, the Sakmarian stage shows a parralel unconformity under the bas