Abstract: There were several different kinds of sedimentary bodies of E3d2 in the northern Bonan Low Uplift which were closely related to structure and evolution of slopebreak zone. It developed a complete slopebreak zone sedimentary cycle of E3d12 in the northern Bonan Low Uplift. In the early stage of the evolution, (iethe early E3d12 period) some ancient gulchs filled with vermiform, chaotic anomalous bodies and lowlying lands developed in slope with submarginal sedimentation. In the late stage of the evolution, (iethe late E3d12 period) after the peneplanation process, the slopebreak zone became the channel of sedimentary deposited in the sub sag area and a series of highangle foresets were deposited within the channel. The anomalous bodies in the early time of evolvement of slopebreak zone were the rapid proximal sedimentary bodies，mainly distributed in the first slope break zone. And in late stage of the evolution, the anomalous bodies, mainly distributed in the second slope break zone, were the distal sedimentary bodies characterized by hightangle progradation. Above all, there were different kinds of sedimentary bodies developing in the northern Bonan Low Uplift from slope to depression during the whole slopebreak zone sedimentary cycle, making up the complex of slopebreak zone and deposition.

Key words: Bonan Low Uplift, slopebreak zone, ancient gulchs, sedimentary body