The detailed geologic study of Wadi Gabgaba area reveals a consideration thickness of Palezoic clastics. The glaciogene sediments are classified into Gabgaba conglomerate at base resulting from the melting of the Late Ordovician ice sheets, hence the conglomerates were released into paleovalleys developed on the piedmont of the rising Red Sea Hills in the area during post-Cambarian time. The complete melting of the ice led to wash sediments; Naqus Formation during Early Silurian time. The rising Red Sea Hills took place in tandem during Paleozoic, but the Carboniferious sediments(Gilf Formation) unconformably overlie different Paleozoic rock units.