Geological Setting Permo-Triassic deposition was followed the Upper Paleozoic Hercynian tectonic movement. After this tectonic movement, the northeast Egypt (northern Sinai) was lowland area, whereas the southern Sinai and Gulf of Suez region were highland areas [15] . During Abstract Facies analysis of the studied Permo-Triassic Qiseib Formation indicates the presence of five lithofacies. These lithofacies are: matrix-supported conglomerates facies (facies A), coarse-to medium-grained

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... facies (facies B), heterolithic facies (interbedded sandstone and siltstone) (facies C), interbedded siltstone and claystone facies (facies D), and mixed clastic-carbonate facies (facies E). These facies were deposited in two fluvial environments: low sinuosity braided and high sinuosity meandering. The braided stream deposits dominate the southern portion of the studied area, whereas the meandering stream deposits prevailed in the northern portion. The fine-grained meandering stream deposits grade laterally to the northern part of the study area into tidally-influenced fine-grained meandering strata (estuarine mud). Figure 3: Field photographs showing A) The Malha Formation (M) overlying the QiseibFormation (Q) in section III. B) The conglomerates (see arrows) of lithofacies A in section I. C) The cross-bedded pebbly sandstone (see arrow) of lithofacies B in section I. D) The flat bedding characterizes the medium-grained sandstones (S) in section II, Notice: and upward gradation from thick to thin sandstone beds (S) that occur between the siltstones and claystones. E) Convolute bedding in the fine-grained sandstone of lithofacies C in section II. F) Pedogenic features (mottling, reddening and yellow and white patches) in the silty claystone of lithofacies D in section III. G) Desiccation cracks (see arrows) filled by gypsum in the silty claystones of lithofacies D in section I. H) Lenticular bedding in lithofacies E ( lenses of yellowish white sandstone in greenish grey silty claystone, and siltstone).