The shape of the Palaeogene basin-controlling faults of Dongying sag had evolved from planar in the early period(basically corresponding to the deposition of the Kongdian Formation)

to listric in the middle period(deposition of the fourth member to the Lower third member of Shahejie Formation)

and finally to slope-flat in the late period(deposition of the second member of Shahejie Formation to Dongying Formation).The intensity of basin-controlling fault activity in Dongying sag shows a left-lateral feature.The spatial distribution of deposits is basically consistent with the strike of main faults in different evolutionary stages of the Palaeogene rifted basin.The fault activities controlled the sedimentary process.Corresponding with the evolution of boundary faults

the Palaeogene basin in Dongying sag had gone through the early rotation half-graben

middle rolling half-graben

and late compound half-graben.