The cover faults in daqing region are mainly developed in formation of huoshiling member late jurassic and its cover formations . according to their formation period , activity characteristics and penetrating relationship , four types of faults were divided , that is fault - depression faults , depression faults , inverted - strike - slip faults and inverted - extension faults ; according to the activity history of the faults , five types of faults were divided , that is long - term active faults , early active faults , early - medium - term active faults , medium - term active faults and terminal active faults 大庆地区内发育在晚侏罗世火石岭组及其以上的沉积盖层中的盖层断裂，依断层形成时期、活动特征及切割层位可将盖层断层细分为四种类型，即断陷期断裂、坳陷期断裂、反转走滑断裂和反转张性断层；按其活动历史可以分为五种类型：即长期活动断层、早期活动断层、早-中期活动断层、中期活动断层和晚期活动断层。
