It is a marine deposit primarily consisting of marl, with gypsum present in the upper part of unit 3.[1][2] and is the lateral equivalent of the terrestrial Guettioua Sandstone. Dinosaur remains are among the fossils that have been recovered from the group, most notably those of indeterminate theropods (=Megalosauridae? indet.),[3] the sauropod "Cetiosaurus" mogrebiensis,[4] the stegosaur Adratiklit,[5] and the ankylosaur Spicomellus.[6]