Heavily faulted (ENE-WSW fractures) Precambrian III rhyolites, with Mn-oxides veins and milky quartz veins network in the same direction.
Wakefieldite is present in quartz veins.
Located in the Central Anti-Atlas, 30 km NW of Ouarzazate.
Ref.:
Bull. Minéral. , 1987, 110, 657-663.