前言长期以来,我国的地质古生物工作者一般均以Misellina带的下限和Pseudoschwage-rina带的上限分别作为二迭系的底界和石炭系的顶界。然而,在我国一些地区,这两个带之间存在沉积间断,表现为这两个带之间的地层层序不全,生物演化系列不连续;而另一些地区,这两个带之间发育了数十米到数百米的连续沉积地层,因而地层层序完整,生物演化 Foreword For a long time, geologists and paleontologists in China generally use the lower limit of the Misellina zone and the upper limit of the Pseudoschwage-rina zone as the top of Permian and Carboniferous, respectively. However, in some areas of China, sedimentary discontinuities exist between the two belts, showing the stratigraphic sequence between these two belts and the series of discontinuous biological evolution. In other areas, the two belts developed Dozens of meters to hundreds of meters of continuous deposition of the formation, and thus complete sequence of stratigraphy, biological evolution