The Shuangatizi area in Liaohe Depression with multi-typed provenances and complicated sedimentary conditions has not been well explored.Armed with terrestrial rift basin sequence stratigraphy and sedimentology theories

the authors studied the sedimentary facies in the sequence stratigraphic framework of the third member of Shahejie Formation (Sha-3 member) through comprehensive analysis of core facies marks

drilling/logging and seismic data.Three sedimentary facies were identified

including the fan delta

the sublacustrine fan and the lacustrine facies.A sequence stratigraphic framework with 3 third-order sequences (namely the lower Sha-3 sequence

the middle Sha-3 sequence

the upper Sha-3 sequence) was also established by using relevant theories and technologies for the third member.It shows that sublacustrine fans were developed extensively during the full sycle of the lower and the ascending half cycle of the middle Sha-3 sequences

fan deltas were developed in the north part of the area and sublacustrine fans were developed in the south part of the area during the descending half cycle of the middle Sha-3 and the full cycle of the upper Sha-3.In general

the sublacustrine fans show features of migration towards the central depression with scales changing from small to large and then to small again.