Named as the basal member of the McCully Formation (new). Type area is on the west side of the Arkansas River near Webbers Falls Reservoir, Muskogee Co, OK. Source of geographic name not stated. Overlies the newly named Brewers Bend Limestone Member of the newly named Sausbee Formation. Underlies and intertongues with shale "A" member of the McCully. Occurs in Muskogee and Cherokee Cos on Chautauqua platform, and in Sequoyah and western Adair Co in Arkoma basin. Is a grain-supported limestone interbedded with thin shale. The grains are principally bryozoan and pelmatozoan debris. Oolitic grainstone occurs locally. Loses its character in Adair Co by thinning, decrease of carbonate content, and increase in sand content. Name replaced eastward by Dye Shale Member of Bloyd Shale. Stratigraphic table. Cross section. Of Middle Pennsylvanian, late Morrowan age.

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