Location of study area in southeastern Kansas. It is overlain by the Altamont Limestone and underlain by the Pawnee Limestone. The Bandera Shale pinches out to the south and to the west. Stratigraphic terminology for the Marmaton Group in southeastern Kansas and chronostratigraphic relations with North American and European scales. Generalized gamma-ray log illustrates typical signatures for the portion of the Marmaton Group studied.
Maroon bands are present in the upper part.
The formation contains limonite concretions and veins, with septarian limestone concretions present locally, and in the lower part, north of Crawford County, the Mulberry coal bed is persistent. Shale below the coal is light to dark gray and carbonaceous. Carbonaceous remains of plant fragments are present in the underclay. 11, T. 35 S., R. 18 E., Labette County, Kansas, a few hundred meters north of the Oklahoma state line.