The Cretaceous period represents considerable geological and climatic changes throughout the Arabian Plate, profoundly affecting depositional ecosystems. This chapter examines the Cretaceous formations with significant hydrocarbon reserves in Iraq, Kuwait, Bahrain, Qatar, and the UAE. During this age, the tropical placement of the Arabian Plate inhibited evaporite formations, promoting wetter conditions that resulted in substantial clastic and carbonate deposits. The Neo-Tethys rifting culminated, extending the Cretaceous Basin boundaries beyond the Jurassic coastlines. Carbonate sedimentation prevailed, characterized by intricate ramp and intrashelf basin formations mixed with clastic influxes. Numerous reef-building creatures, especially rudists, became dominant, forming carbonate platforms that diversified vertically and horizontally due to tectonic movements. Tectonic action, such as southwest tilting and salt tectonics along the Qatar Arch, affected regional stratigraphy. This chapter analyzes important formations within this period, specifically the Sulaiy and Yamama formations of the Early Cretaceous, formed of continuous shallow-water carbonates with local intrashelf basins. The sedimentological evolution of formations such as Ratawi, Kharaib, Shu’aiba, Nahr Umr, Mauddud, Mishrif, and Simsima is elaborated, with each formation enhancing the region's hydrocarbon potential. Focus is directed toward facies analysis and depositional settings, demonstrating transitions from carbonate to clastic-dominated systems and the intricate interactions among tectonics, sea-level fluctuations, and climatic factors that influenced the Cretaceous strata of the Arabian Plate.