الفهرس 
Photogeological studiesOnly 14 pages are availabe for public view
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Abstract
The investigated area is located at about 80 kilometer southeast Aswan town. It is mainly formed from Foreland sediments ( Nubian sandstone formation ) underlain by Precambrian igneous and metamorphic rocks which represented by schist, dioritegranodiorite- grey granites complex and younger granitic rocks. These rocks outcrop in different localities of the study area and unconformably overlain by the Foreland sediments represented by the Cretaceous Nubian sandstone formation and Quaternary deposits filling the wadis and their tributaries as well as the vast plains which located between high lands. The main object of this study is to define, delineate and mapping the exposed lithological units and the structural elements affecting the area under investigation. This study depends mainly on the photogeological interpretation of aerial photographs of scale 1 :40,000, and photomosaics of scale 1:50,000 in addition to the integrated aeroradiometric and aeromagnetic survey data as the main sources of information. According to the photogeological studies the various basement rock units which exposed in the area are including schist, diorite, granodiorite, younger granite, and acidic, intermediate and basic dykes. The Nubian sandstone Formation was divided into three different lithological units, each one is characterized by distinct tone, topographic expression, lineament pattern and density of the drainage pattern. They are from older to younger, Nl, N2 and N3, The first unit (N1) is formed fiom conglomerates, kaolin and sandstone intercalated beds of different grain size. On aerial photograph it is characterized by slightly dark grey tone, fine surface texture, medium to fine drainage density and possess medium resistance to the weathering processes. The second unit (N2) is formed from sandstone beds of different grain size, sandy shales and ferruginous sandstone. It is characterized by dark grey tone, course grain, mottled surface texture, a relatively high drainage density and high resistance to weathering processes. While, the upper unit (N3) is composed of variegated shales, sandy shales, sandstone and quartzite beds, so it is characterized by very dark grey tone, fine surface texture, low resistance to weathering and it forms small hilly terrain exposed in sand plains . Structurally, the area is highly affected by NW-SE, NE-SW and ENE-WSW faults and fractures. Wadis and their major tributaries are greatly affected by these faults. Also the lower unit of the Nubian sandstone (Nl) is affected by NW-SE trending folds.