On the basis of the lithology, fossil assemblages and seismic wave groups, the Lower Jurassic in the northern Hami depression may be in ascending order into the Badaowan Formation and Sangonghe Formation.

• 哈密拗陷北部下侏罗统按其岩性、化石组合和地震波组等特征自下而上分为八道湾组和三工河组。