21. Geologic map of the East Portal quadrangle, Boulder, Gilpin, and Grand counties, Colorado Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading
22. Geologic map of the Jacobs Well and southern part of the Elbow Canyon quadrangles, Mohave County, Arizona Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading
23. Geologic map of the Kennebago Lake quadrangle, Franklin County, Maine Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading
24. Geologic map of the lower east rift zone of Kilauea Volcano, Hawaii Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading
25. Geologic map of the Mount Bangs quadrangle, Mohave County, Arizona Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading
26. Geologic map of the Mountain Sheep Springs quadrangle, Mohave County, Arizona Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading
27. Geologic map of the Nephi 30ʹ x 60ʹ quadrangle, Carbon, Emery, Juab, Sanpete, Utah, and Wasatch counties, Utah Author/Creator: Geological Survey (U.S.) Publication/Creation: [Denver, CO?] : [For sale by Map Distribution] Resource Type: Map Access & Availability: Loading
28. Geologic map of the northwestern Caliente Range, San Luis Obispo County, California Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading
29. Geologic map of the northwestern part of the Uncompahgre Uplift, Grand County, Utah, and Mesa County, Colorado, with emphasis on Proterozoic rocks Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading
30. Geologic map of the Portage quadrangle, Cascade and Choteau counties, Montana Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading