 Reservoirs are largely carbonate build-ups and reefs with some offshore production in the Gulf of Sidra.Carbonate reservoirs are largely related to two Upper Cretaceous and two Paleocene cycles of sedimentation in a syn-rift fill sequence; however, there is minor Mid-Cretaceous calcarenite production.Giant oil fields in this unit include Intistar, Beda, Defa, Waha, Haram, Zelten (Nasser), Hofra and Nafoora.