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Geologic Maps

Other States Geologic Maps

Nevada Bureau of Mines & Geology
      •  Maps & Data

Oregon Department of Geology and Mineral Industries
      •  Publications
      •  Index to Geologic Maps of Oregon by USGS Topographic Quadrangle Name, 1883-1996

Washington Geological Survey
      •  Geologic Maps
      •  Publications and Maps

Links to State Geological Surveys Association of American State Geologists
        Most have lists of and/or links to their geological maps

List of U.S. Geological Survey Geologic and Water-Supply Reports and Maps for [various states]
Digitized versions via Hathitrust:

Geologic Map Index of [various states] (USGS)
Search OneSearch-Books & Media to find the call number.