OF-05-08 Geologic Map of the Buena Vista West Quadrangle OF-05-08 Geologic Map of the Buena Vista West Quadrangle, Chaffee County, Colorado
OF-04-03 Geologic Map of the Alma Quadrangle OF-04-03 Geologic Map of the Alma Quadrangle, Park and Summit Counties, Colorado
OF-03-20 Geologic Map of the Copper Mountain Quadrangle OF-03-20 Geologic Map of the Copper Mountain Quadrangle, Summit, Eagle, Lake, and Park Counties, Colorado
OF-03-21 Geologic Map of the Electra Lake 7.5-Minute Quadrangle OF-03-21 Geologic Map of the Electra Lake 7.5-Minute Quadrangle, La Plata County, Colorado
OF-03-15 Geologic map of the Taylor Ranch Quadrangle OF-03-15 Geologic map of the Taylor Ranch Quadrangle, Costilla County, Colorado
OF-02-01 Geologic Map of the Hermosa Quadrangle OF-02-01 Geologic Map of the Hermosa Quadrangle, La Plata County, Colorado
OF-02-03 Geologic Map of the Keystone Quadrangle OF-02-03 Geologic Map of the Keystone Quadrangle, Summit County, Colorado
OF-02-07 Geologic Map of the Breckenridge Quadrangle OF-02-07 Geologic Map of the Breckenridge Quadrangle, Summit and Park Counties, Colorado
OF-02-12 Sand and Gravel Resources Adjacent to the Colorado River Valley OF-02-12 Sand and Gravel Resources Adjacent to the Colorado River Valley, Garfield County, Colorado
OF-99-04 Geologic Map of the Durango West Quadrangle OF-99-04 Geologic Map of the Durango West Quadrangle, La Plata County, Colorado
OF-99-06 Geologic Map of the Durango East Quadrangle OF-99-06 Geologic Map of the Durango East Quadrangle, La Plata County, Colorado
OF-99-07 Geologic Map of the Mt. Sopris Quadrangle OF-99-07 Geologic Map of the Mt. Sopris Quadrangle, Garfield and Pitkin Counties, Colorado