The Upper Cretaceous Sudr Formation at Wadi El Dakhl, West Gulf of Suez, Egypt, was described based on its diagenetic characteristics and sequence stratigraphy in order to enhance our ability to realize the evolution of the sedimentary basin in the study area. The diagenetic characteristics in the studied succession include the following processes: cementation, recrystallization, compaction, and dolomitization that are particularly sensitive to post-sedimentation evolution. Two depositional sequences (DS-1 and DS-2) were distinguished based on their lithological aspects, facies types, and diagenetic characteristics that were constrained by two sequence boundaries (SB-1 and SB-2). Each sequence was classified into transgressive (TST) and highstand (HST) sediments separated by the deepest marine conditions called the maximum flooding surface (MFS). The sediments were characterized by significant …