Sedimentologic and lithostratigraphic studies carried out along the southern Front of the Central High Atlas in a mostly terrigenous Jurassic-Cretaceous series (Red beds) allow specifying the paleoenvironmental and paleogeographic evolution of three units: Guettioua, Ifezouane and Aoufous formations. The Bathonian Guettioua Fm, composed of terrigenous deposits of a median-distal piedmont and a proximal alluvial plain, is arranged into a regressive mesosequence. A terrigenous Lower (Mbr1) and an Upper (Mbr3) members of the Ifezouane Fm (Albian?-Cenomanian) were deposited in a median to a distal alluvial plain. Paleocurrent analysis indicates a southern source area of the terrigenous material mainly resulting from erosion of the neighbouring or distant Precambrian and Paleozoic basement. The southern origin of the material is opposite to a northern source proposed by authors for the surrounding western areas. These terrigenous supplies are interspersed with a lagoonal-marine incursion that covered the region during the deposition of a Middle Member (Mbr2) of the Ifezouane Fm. Fossiliferous limestone layers have yielded a restricted euryhaline microfauna and macrofauna. This restricted lagoon, E-W oriented with a multi-kilometre extension, was probably opened towards the East. By lateral correlations, this lagoonal-marine event can be dated to the Albian? - Cenomanian interval. This Cretaceous transgression, well documented for the first time, belongs to an earlier mesosequence recorder before the widespread and well-known Upper Cenomanian-Turonian transgression.

沿中部高图集的南部锋面进行了沉积学和岩石地层学研究，主要是陆源的侏罗纪-白垩纪系列（红色岩床），可以确定古埃蒂瓦，伊费苏安和奥古斯地层这三个单元的古环境和古地理演化。由中-远前山和近冲积平原的陆源性沉积物组成的巴东纪古提瓦群岛Fm排列成递归的中层序。Ifezouane Fm（Albian？-Cenomanian）的陆源下层（Mbr1）和上层（Mbr3）沉积在远端冲积平原的中部。古流向分析表明，陆源物质的南部源区主要是由于邻近或远距离的前寒武纪的侵蚀所致。和古生代地下室。该材料的南部起源与作者为周围西部地区提出的北部来源相反。这些陆源供应物散布着泻湖-海洋入侵，该入侵在伊法祖恩Fm的中层成员（Mbr2）沉积期间覆盖了该地区。化石的石灰岩层已经产生了有限的欧亚微生态圈动物和大型动物群。这个受限制的泻湖，以电子战为导向，延伸了多公里，很可能向东方开放。通过横向相关性，这种泻湖-海洋事件可以追溯到阿尔比？-西诺曼尼亚间隔。这种白垩纪海侵首次得到了有据可查的，在更广为人知的上西诺曼尼亚-土伦海侵之前，它属于较早的中序记录器。