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本区晚古生代含煤地层发育完整,出露良好。前人已作了大量的生物地层工作。我们对其系统地进行了古地磁研究工作后,确认本区二叠纪基亚曼(Kia-man)反极性时的存在。其古纬度为11.2°N(P_1)-15.6°N(P_2),为本区在此阶段处于低纬度气候带,由热带雨林气候逐渐北移过渡为热带干湿季气候的论点提供了重要依据。
Late Paleozoic coal-bearing strata in this area are well developed and well exposed. The predecessors have made a large number of biological formation work. After systematically carrying out paleomagnetic studies, we confirmed the existence of the Kia-man reverse polarity in the Permian. The ancient latitudes are 11.2 ° N (P_1) -15.6 ° N (P_2), which provides an important basis for the fact that the region is in a low-latitude climatic zone at this stage and is gradually shifting from a tropical rain forest climate to a north-south tropical climate .