Name applied as an informal unit of purple clay-shale, light green silt, and white to yellow sand and sandstone in upper White Owl Creek Member (newly named), upper member of Fox Hills Formation. Lithologically variable. OPHIOMORPHA present locally. Is well exposed near Enning, SD, Stoneville quad, Meade Co in the Williston basin. Good exposures of its upper and lower contacts seen along Bull Creek 1.5 mi west of Enning. No type locality designated. Overlies lower massive to cross-bedded sandstone of White Owl Creek. Basal contact placed at type section of White Owl Creek at first occurrence of massive cross laminae of white and buff sand--88.3 ft below top of White Owl Creek and 86.7 ft above base of White Owl Creek. Geologic map shows areal extent of facies in report area. Underlies White River Group in type section of White Owl Creek Member. Of Late Cretaceous, Maestrichtian age. Columnar sections.

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