الفهرس 
Introduction
Pre-cambrian basementOnly 14 pages are availabe for public view
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Abstract
Seismic and well geologic data have been used to study the seismic stratigraphy and geologic history of the continental margin of North Sinai. The interpretation of a grid of seismic lines indicated that, the sedimentary sequence of this passive continental margin is made up of four seismic sequences separated by three regional unconformities (the top Messinian, reflector M; the top Oligocene, reflector O and the top Cretaceous, reflector uC). Reflector M is the most widely known reflector in the entire Mediterranean and it forms the surface of the Messinian evaporities formed as a consequence to the ”Messinian Salinity Crisis”. The sequence above reflector M (sequence A), comprises the Pliocene-Quaternary sediments which built mainly by mass movement and gravity driven deposits of the Nile river forming an eastern extension to the Nile Cone. This sequence shows a great deal of deformation of soft sediments which resulted in the formation of slides, slumps, debris flows, and listric and growth faults. A number of seismic facies, which related to gravity driven sediments, have been identified; these includes, parallel, chaotic, transparent, drape, mounded and Onlap fill facies. The sequence below reflector M (Sequence B), comprises the sediment facies deposited from the Oligocene to the Messinian salinity crises. Sequence B divides by an intermediate reflector (mM reflector) represents the base of the middle Miocene sediments. Sequence C is formed on the top of the eroded folded of the ENE Syrian Arc folds. The top of sequence C is marked by a wavy shape reflector (reflector O) and followed by reflector E (upper Eocene). This sequence is relatively thin and wedges out seaward. The boundary between sequence C and sequence D is defined by the upper Cretaceous regional unconformity (reflector uC). Sequence D, consists of the seismic facies units deposited from the Jurassic to the upper Cretaceous (uC). Reflectors O and E usually pinches out against the upper Cretaceous reflector (uC) Sequences C and D, shows clearly the effect of the Syrian Arc system of folds which have been cutted by faulting in many places in different trends.
Shale deformational features are clearly identified on the Egyptian Mediterranean margin at offshore North Sinai. Shale deformation features are numerous and comprises; shale diaprism, shale lumps, shale masses, shale walls, shale associated faults and shale flow structures. These features were observed in the Pliocene section and below the Messinian evaporite layer. The origin of the shale is probably the shale succession deposited in the Oligocene-Early Messinian cycle. These shales intruded vertically and laterally to cause the shale deformation features.