Named as a member of Kalo Formation of Cherokee Group of Des Moines Supergroup for exposures around the town of Cliffland, Wapello Co, IA on the Iowa shelf. Type section is an abandoned railroad cut in NE1/4, NE1/4, SE1/4 sec 18, T71N, R12W in Wapello Co. Consists at type of two coal beds at base and at top; the lower coal is 1.8 to 3.4 ft thick; the upper bed is 1.4 ft thick; the two coals are separated by 3.2 ft of brown to gray mudstone (or shale). Overlies and underlies unnamed coarsening upward sequence of shale, siltstone and sandstone of Kalo. Probably is more persistent than the older Blackoak Coal Member of the Kalo. A single bed is present over most of Mahaska, Wapello, and Davis Cos. In the remainder of the area, the single coal is split into two beds. Correlative units described. Of early Desmoinesian, Pennsylvanian age. Nomenclature chart. Cross section. Graphic section. Occurrence noted in Clarke, Mahaska, Polk, Davis, Jefferson, and Van Buren Cos., also on the Iowa shelf.

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