Abstract
The biostratigraphy of Sidi Kralif formation is precised by means of correlation of calpionellid, ostracod and ammonite faunas in three sections of Nara Mountain (Central Tunisia). The Upper Tithonian (Jacobi zone pars) and the Lower Berriasian (Grandis zone) show 40 m of pelagic sediments above the Nara dolomitic formation. The Middle Berriasian (Occitanica zone) under the same facies points out variations of thickness (60 to 100 m). Only the lower part of the Upper Berriasian (Paramimounum subzone) is present at the upper part with neritic facies (bioclastic limestones, sandstones, dolomites, breccia) and some changes of thickness (10 to 100 m). With the Upper Berriasian begins the thick detritic Meloussi formation.
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