31. Geologic map of the southern Sheep Range, Fossil Ridge, and Castle Rock area, Clark County, Nevada Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading
32. Geologic map of the Swisshelm Mountains, and a description of the development of the Swisshelm and Pedregosa Mountains, Cochise County, Arizona Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading
33. Geologic map of the Twin Buttes quadrangle, McKinley County, New Mexico Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading
34. Geologic map showing configuration of the bedrock surface, North Platte 1⁰ x 2⁰ quadrangle, Nebraska Author/Creator: Geological Survey (U.S.) Publication/Creation: Reston, Va. : U.S. Geological Survey, 1991 Resource Type: Map Access & Availability: Loading
35. Geologic map showing the thickness and structure of the Anderson-Wyodak coal bed in the north half of the Powder River Basin, southeastern Montana and northeastern Wyoming Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Branch of Distribution Resource Type: Map Access & Availability: Loading
36. Geologic map showing the thickness and structure of the Anderson-Wyodak coal bed in the south half of the Powder River Basin, northeastern Wyoming Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Branch of Distribution Resource Type: Map Access & Availability: Loading
37. Geologic map showing total thickness of coal in the north half of the Powder River Basin, southeastern Montana and northeastern Wyoming Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading
38. Geologic map showing total thickness of coal in the south half of the Powder River Basin, northeastern Wyoming Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading
39. Map showing surficial and generalized bedrock geology and accompanying side-looking airborne radar image of the Radford 30ʹ x 60ʹ quadrangle, Virginia and West Virginia Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading
40. Marine geologic map of the Puerto Rico insular shelf : Guánica to Ponce area Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading