Re-interpretation of the Kef N’Hal structure. (A) Simple geological map (modified from Mattauer, 1958). (B) Cross-section of Kef N’Hal modified after Mattauer (1958). The main modification is the re-interpretation at depth with a megaflap. Given our re-interpretation, the “nappe” contact is more likely to be the scar of a former salt canopy. (C, D) Pictures of the unconformity between the Aptian-Albian and the upper Jurassic or the lower Jurassic series, respectively. (E) Focus on the unconformity between lower Jurassic and Aptian-Albian series, showing the conglomeratic formation and the stratigraphic contact.