Abstract
In southern Tunisia, the carbonate series of the Upper Cretaceous (from Turonian to Campanian) are widely present in the Saharan platform and the Chotts ridge. The study of several sections in this area permits analyzing these carbonates which help to determine their depositional environment. This study was based not only on a detailed facies but also on a microfacies analysis. Fourteen facies were identified. They could be organized in six facies associations which characterize a ramp environment ranging from tidal flat to middle ramp settings. These carbonates show considerable variations of facies and thickness with many syn-tectonic figures (slumps). This result contrasts the monotony of these series and indicates a very important sedimentary dynamics. This dynamic is controlled primarily by the reactivation of preexistent faults.
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