Named as one of five members of Supai Formation for Cibecue Creek, Navajo Co, AZ in the Black Mesa basin. Type section exposed in bluff north of road to Grasshopper, beginning in Cibecue quad, about a mi southwest of town of Cibecue, then offset about half a mi to northwest by tracing key beds to a point south of hill 5490 in adjacent Chediski Peak quad. Mapped in southern part of quad. Lower contact placed at base of reddish-brown to gray, calcareous mudstone that rests in gray, thin-bedded, generally fossiliferous limestone of basal limestone and sandstone member of Supai. Upper contact placed at top of reddish-brown sandstone that is overlain by paler reddish-brown, generally calcareous siltstone of the sandstone and siltstone member of the Supai. Composed of reddish-brown to light gray, cross-bedded sandstone and shale [color not given]. Entire member is calcareous. Has 1-2 nodular limestone beds. Lenses of limestone and chert pebbles at various locations. Is 280-340 ft thick in quad. Fossil plants at type. Considered Pennsylvanian? and Permian age.

Source: GNU records (USGS DDS-6; Denver GNULEX).