The Geologic Atlas of the United States is a map folio series produced by the USGS from 1894 to 1945. Each folio includes a topographic and several thematic maps for each quad in the folio along with text pages describing the geology and economic geology for the mapped areas. Only 220 odd folios were produced, so the area covered is very limited.

A. Geologic Atlas of the United States Telluride Folio #57
B. Geologic Atlas of the United States Rico Folio #130
C. Geologic Atlas of the United States Needle Mountains Folio #131
D. Geologic Atlas of the United States Silverton Folio #120
E. Geologic Atlas of the United States La Plata Folio #60
F. Geologic Atlas of the United States Engineer Mountain Folio #171
G. Geologic Atlas of the United States Ouray Folio #153

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Condition:

All folios are ex-library. Overall condition is very good to satisfactory with the following clarifications: most folios have loose bindings; #57 has toning on front cover and a minor damp stain in top corner margin; #130 has a chipped and stained front cover; #131 has water damage on top corner and right edge; #120 has minor fire damage and damp stains in blank margins; #60 has chipped covers; #153 has minor damp stains in blank margins