La limite Cénomanien-Turonien dans le Haut Atlas central, Maroc

On the northern side of the Central High Atlas, new lithological and biostratigraphical data, especially realized in the Naour syncline, allow us to precise the Cenomanian-Turonian boundary. We recognized in that syncline an apparently complete series, the Ben Cherrou series, that represent the Upper Cenomanian-Turonian interval. We recommend it as the referring section of the Ben Cherrou Formation, that takes the place of the incomplete and not representative Aït Attab Formation. More, the sedimentological and paleontological analysis, suggest a Tethyan origin for the Cenomanian-Turonian transgressions in the studied area.