根据煤系垂直发育与平面分布的特征,本文提出用古河流分布来表示侏罗纪戒煤期的古地理,笔者根据地层分区、煤系下部的砂体形态、粒度分析成果、底砾岩砾石倾斜方向测定等资料,结合将今论古的原则,描绘出了祁连区及其相邻地区的古地理图,它较为完善地解释了含煤盆地的特征。 According to the characteristics of vertical development and plane distribution of coal measures, the paleo-river flow distribution is used to represent the paleogeography of the Jurassic period. Based on the results of stratigraphic division, sandbody morphology and grain size analysis of the lower coal measures, Tilt direction and other data, combined with the ancient principles of today, depicting the Qilian area and its adjacent areas paleogeography map, which is more perfect explanation of the features of the coal-bearing basin.