The upper part of the Fort Payne Formation contains a series of prograding sandstones and carbonates. Sandstones were mapped as unnamed members on 7.5-minute geologic quadrangle maps (e.g.,Thaden and Lewis, 1962, 1966), but were subsequently named and described as the Jabez and Knifley Members (Sedimentation Seminar, 1972; Kepferle and Lewis, 1975; Pryor and others, 1980). These sandstones exhibit a regional geometry that mirrors (but is more subdued than) the underlying geometry of the Borden delta front (Fig. 1). The Cane Valley Limestone Member consists of a series of prograding carbonate lenses and clinoforms at the top of the Fort Payne Formation (Sedimentation Seminar, 1972; Kepferle and Lewis, 1975). In some cases these limestone lenses were mapped as distinct limestones or combined with the so-called reef limestones on 7.5-minute geologic quadrangle maps. The type section of the Jabez sandstone, is at Harmon Creek, on Lake Cumberland.