The following correlations are made:

The Viola ("white") lime of the oil fields, with the uppermost limestone in contact with the Chattanooga shale near Tahlequah, and with the upper part of the Viola limestone in the Arbuckle Mountains.

The "post-Wilcox" well cuttings, with the Bromide formation in the mountains, and with the Tyner sediments between the Viola lime equivalent and the "Burgen" sandstone near Tahlequah.

The "true Wilcox" sand, with the first thick ridge-forming sandstone below the base of the Viola limestone in the mountains, with the "Burgen" sandstone at Tahlequah, and, possibly, with the St. Peter sandstone of Missouri and Iowa.

The green-shale series found in wells stratigraphically below the "Wilcox" sand with the main body of the Simpson formation.

The "Hominy" sand of the oil fields with one of the lower Simpson sands, and, possibly, with the Everton sand of Missouri.

The "Siliceous lime," with the unnamed Ordovician dolomite at Spavinaw, and with a part of the Arbuckle lime in the mountains.