Wadi Um Gheig area comprises a variety of Neoproterozoic rocks including serpentinites of ophiolite assemblage,
metavolcanoclastics, schists, metavolcanics and metagabbro of island arc assemblage. The migmatite and gniesses represent
high grade metamorphic rocks. The syntectonic fresh gabbro, as well as tonalite and granodiorite in addition to the late to post
tectonic granitoids are recorded. Lithological mapping in the Wadi Um Gheig is carried out by using Landsat Thematic Mapper
(ETM+) image enhancement techniques including RGB band ratios and supervised classification. In the present study new
proposed band ratio (7/1, 3/1, 5/7) with the supervised classification are used and proved a good efficiency for discriminating
and mapping the different rock units in the Wadi Um Gheig