Geologic Atlas of the United States
A set of 227 folios published by the U.S. Geological Survey between 1894 and 1945. Each folio includes both topographic and geologic maps for each quad represented in that folio, as well as description of the basic and economic geology of the area.
Paper format folios are housed in the map case at the east end of the science library; they are very fragile and brittle. Digitized copies of the folios, with a TIFF or other image file for every page, are at Texas A&M University. See also Ben Schubert, The Geologic Atlas of the United States, 2014-03-13, https://edx.netl.doe.gov/dataset/geologic-atlas-of-us