41. Geologic map of Morrill County, Nebraska Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : U.S. Geological Survey Information Services [distributor]. Resource Type: Map Access & Availability: Loading
42. Geologic map showing thickness of sedimentary rocks from the ground surface to the top of the upper Cretaceous Pierre Shale in the south half of the Powder River Basin, northeastern Wyoming and adjacent areas Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading
43. Reconnaissance geologic map of the southern Sierra Nevada, Kern, Tulare, and Inyo counties, California Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : U.S. Geological Survey Information Services [distributor] Resource Type: Map Access & Availability: Loading
44. West-east stratigraphic transect of Cretaceous rocks in the northern Rocky Mountains and Great Plains regions, southwestern Montana to southwestern Minnesota Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by U.S. Geological Survey Information Services Resource Type: Map Access & Availability: Loading
45. Geologic map and structure sections of the Clear Lake volcanics, northern California Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : U.S. Geological Survey Information Services [distributor]. Resource Type: Map Access & Availability: Loading
46. Historic trail map of the Lamar 1° x 2° quadrangle, Colorado and Kansas Author/Creator: Scott, Glenn R., 1918-2012 Publication/Creation: Reston, Va. : U.S. Geological Survey, 1995 Resource Type: Map Access & Availability: Loading
47. Quaternary geologic map of the Dakotas 4° x 6° quadrangle, United States Author/Creator: Geological Survey (U.S.) Publication/Creation: Reston, VA : The Survey ; Denver, CO : For sale by Map Distribution, 1995 Resource Type: Map Access & Availability: Loading
48. Geologic map of the Portal quadrangle and vicinity, Cochise County, southeast Arizona Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading
49. Map showing synopsis of seismotectonic features in the vicinity of New Madrid, Missouri Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by U.S. Geological Survey Information Services Resource Type: Map Access & Availability: Loading
50. Geologic map of the Ontonagon and part of the Wakefield 30ʹ x 60ʹ quadrangles, Michigan Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading