Kansas Geological Survey, Current Research in Earth Sciences, Bulletin 241,
Distribution of the Bandera Shale of the Marmaton Group, Middle Pennsylvanian of Southeastern Kansas--fig. 2
Fig. 2. Stratigraphic terminology for the Marmaton Group in southeastern Kansas and chronostratigraphic relations with North American and European scales. Chronostratigraphic relationships between Europe and North America came from COSUNA stratigraphic correlation charts (Salvador, 1985, fig. 1, p. 182). Generalized gamma-ray log illustrates typical signatures for the portion of the Marmaton Group studied.
Kansas Geological Survey
Web version June 24, 1998