(1996) reported an informal division of the Kem Kem Beds: a lower red sandstone unit ("gres infrecenomanien") and an upper marley unit ("marne versicolores a gypse"). Because of the absence of hiatuses between and within the three formations, the represented time scale is of around 8 million years, covering the time from the Early Cenomanian to the Middle Turonian. The Aoufous Formation is exposed from the Anti-Atlas and High Atlas mountain ranges up to the Sahara craton, in the southeastern part of Morocco.