1. Regional stratigraphic cross sections of Cretaceous rocks from east-central Arizona to the Oklahoma Panhandle Author/Creator: Geological Survey (U.S.) Publication/Creation: [Reston, Va.] : The Survey, 2001 Format: Map Edition: Version 1.0, last modified 5 Dec. 2001. Access & Availability: Loading
2. Regional stratigraphy and petroleum systems of the Appalachian Basin, North America Author/Creator: Swezey, C. (Christopher) Publication/Creation: Denver : For sale by U.S. Geological Survey, Information Services Format: Map Access & Availability: Loading
3. Regional stratigraphy and petroleum systems of the Illinois Basin, U.S.A Author/Creator: Swezey, C. (Christopher) Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2009 Format: Map Access & Availability: Loading
4. Regional stratigraphy and petroleum systems of the Illinois Basin, U.S.A Author/Creator: Swezey, C. (Christopher) Publication/Creation: Denver, Colo. : For sale by U.S. Geological Survey, Information Services Format: Map Access & Availability: Loading
5. Regional stratigraphy and petroleum systems of the Michigan Basin, North America Author/Creator: Swezey, C. (Christopher) Publication/Creation: Denver, Colo. : For sale by U.S. Geological Survey, Information Services Format: Map Access & Availability: Loading
6. Revised correlation chart of coal beds, coal zones, and key stratigraphic units in the Pennsylvanian rocks of eastern Kentucky Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Format: Map Access & Availability: Loading
7. Rock-stratigraphic nomenclature, lithology, and subcrop area of the Galena-Platteville bedrock unit in Illinois and Wisconsin Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 1997 Format: Map Access & Availability: Loading