Name formally proposed in this report for massive upper limestone member of Kinkaid Formation of Elviran age. Name Goreville was introduced on rock classification chart by Baxter and others (1963: IL G.S. Circ. 342, p. 6). A limestone unit 15 to 45 ft thick. Overlies Cave Hill Member and underlies Grove Church Formation. Type section consists of about 33 ft of cherty limestone without shale interruptions.

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

Authors here revise Grove Church Shale (of Swann, 1963) as Grove Church Member of Kinkaid Limestone as it does not meet the test of mappability required by the 1983 Code. Interbedded shale and limestone of the Grove Church are lithologically similar to the rest of the Kinkaid. Ascending Negli Creek Limestone, Cave Hill, and Goreville Limestone Members also traceable in outcrop and subsurface in southern IL. Goreville consists almost entirely of limestone and a few shale partings. Goreville is thin or missing in places because of erosion, but maximum thickness reaches 35 to 45 ft. Exposures in the Eddyville quad are medium to dark gray or brownish gray and fine to coarse grained. Highly argillaceous in some parts, containing thin layers of olive gray, calcareous shale. Chert nodules and bands also conspicuous in places. Age is Chesterian.

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