Distribution and facies changes of the U. pliocene-Pleistocene sediments in the area around Aulad Toq Sharq exhibit three depositional modes: 1: In the first mode, which probably in Late Pliocene-Early Pleistocene the earliest sedimentation was started with flood plain fine siliciclastics (Madamoud Formation), followed upward by accumulations of relatively thick terrigenous lacustrine sediments at the west, which have been interfingered laterally eastward into coarse conglomerates of alluvial fan facies (Armant Fm.). These fans interfingered with talus deposits (Issawia Fm.). 2: In the second mode, probably in the beginning of Middle Pleistocene dominant cross bedded sandstones were accumulated in the northerly trending intermittent channels (Qena Fm.), followed upward by coarse clastic fans derived from reactivated drainage wadis in the east (Abbasia Fm.).3:In the third later mode by the end of Pleistocene, flood plain deposits composed of massivly fine siliciclastics were accumulated on the overbank areas of the River in the west, while in the local inland lakes in the east laminated fine siliciclastics and stromatolitic limestones were deposited (Dandara Fm.). Continuous clastics supply come from the east led to accumulations of conglomerates (El Gir Conglomerates) as proximal fan facies interfingering the Dandara Fm.