Korn, Klug & Reisdorf, 2000, p.72:

Jebel Ouaoufilal East (7 km north-northwest of Taouz): The easternmost section in the Amessoui Syncline already displays a facies indicating the proximity of the Tafilalt Basin that is developed further east.

The crinoid limestones are 4.5 in thick and overlain by a thin black limestone bed with Platyclymenia annulata.