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