OF-01-04 Geologic Map of the Basin Mountain Quadrangle OF-01-04 Geologic Map of the Basin Mountain Quadrangle, La Plata County, 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-03-02 Geologic Hazards of the Georgetown OF-03-02 Geologic Hazards of the Georgetown, Idaho Springs, and Squaw Pass Quadrangles, Clear Creek County, Colorado
OF-03-08 Geologic Map of Falcon NW Quadrangle OF-03-08 Geologic Map of Falcon NW Quadrangle, El Paso 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-02-02 Geologic Map of the Elsmere Quadrangle OF-02-02 Geologic Map of the Elsmere Quadrangle, El Paso County, Colorado
OF-02-03 Geologic Map of the Keystone Quadrangle OF-02-03 Geologic Map of the Keystone Quadrangle, Summit County, Colorado
OF-02-04 Geologic Map of the Monument Quadrangle OF-02-04 Geologic Map of the Monument Quadrangle, El Paso County, Colorado
OF-02-05 Geologic Map of the Cheyenne Mountain Quadrangle OF-02-05 Geologic Map of the Cheyenne Mountain Quadrangle, El Paso County, Colorado
OF-02-06 Geologic Map of the Fort Garland SW Quadrangle OF-02-06 Geologic Map of the Fort Garland SW Quadrangle, Costilla 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