1. Altitude of the top of the Deadwood Formation in the Black Hills area, South Dakota Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, Colo. : For sale by USGS Branch of Information Services Resource Type: Map Access & Availability: Loading
2. Altitude of the top of the Inyan Kara Group in the Black Hills area, South Dakota Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, Colo. : For sale by USGS Branch of Information Services Resource Type: Map Access & Availability: Loading
3. Altitude of the top of the Madison Limestone in the Black Hills area, South Dakota Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, Colo. : For sale by USGS Branch of Information Services Resource Type: Map Access & Availability: Loading
4. Altitude of the top of the Minnekahta Limestone in the Black Hills area, South Dakota Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, Colo. : For sale by USGS Branch of Information Services Resource Type: Map Access & Availability: Loading
5. Altitude of the top of the Minnelusa Formation in the Black Hills area, South Dakota Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, Colo. : For sale by USGS Branch of Information Services Resource Type: Map Access & Availability: Loading
6. Digital bedrock geologic map of the Ashland and the northern part of the Ironwood 30ʹ x 60ʹ quadrangles, Wisconsin and Michigan Author/Creator: Cannon, William F. Publication/Creation: [Denver, Colo.] : [For sale by USGS Information Services (Open-File Report Sales)]. Resource Type: Map Access & Availability: Loading
7. Surficial geologic map of central and southern New Jersey Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : Information Services [distributor]. Resource Type: Map Access & Availability: Loading