Based on the geotectonic background of the southern margin of the North China platform of Middle Ordovician, the sedimentary environments and sedimentary patterns of Pingliang Formation are analyzed.

• 从中奥陶世华北地台南缘大地构造背景出发，分析了鄂尔多斯盆地南缘中奥陶统平凉组的沉积环境和沉积模式。