贵州黔北分区属扬子地层区,北与黔东北分区和黔北分区接壤,西与黔南分区毗邻,东南与江南地层区—三都分区紧靠。该区从未发现过中奥陶世宝塔期的地层,奥陶系最高层位普遍只达到大湾组。1983年6月,笔者等在前人工作的基础上,于施秉齐家坝发现了中奥陶统宝塔组,并详测了剖面,从而对此区奥陶系重新进行了划分与对比。 Guizhou North Guizhou sub-region belongs to the Yangtze stratigraphic zone, north and northeast Guizhou and Guizhou North Division bordering the west and Qiannan sub-area adjacent to the southeast and Jiangnan formation - Sandu sub-district close. The region has never been found in the Middle Ordovician pagoda period strata, the highest Ordovician generally reached only Taiwan Formation. In June 1983, on the basis of previous work, the author discovered the middle-Ordovician pagoda formation in Qibing Qijiaba and conducted a detailed survey of the profile so as to re-divide and contrast Ordovician in this area.