the northern edge of the Saharan platform. The exposed Permian sequence at Jebel
Tebaga of Medenine and Baten Beni Zid consists at least of 850m of marine strata grading to nonmarine red beds. It is made up of local biohermes, thin carbonate beds, bioclastic limestone, sandstone and shale. The main feature of Permian
sequence is the abrupt and complex facies changes due to presence
of obscure and inferred faults. Particularly, presence of the fusulinacean Yabeina at Oum el Afia section suggests that these rocks are younger than those outcropping at Baten Beni Zid.