OF-08-15 Geologic Map of the Bayfield Quadrangle OF-08-15 Geologic Map of the Bayfield Quadrangle, La Plata County, Colorado
OF-07-02 Geologic Map of the Montrose East Quadrangle OF-07-02 Geologic Map of the Montrose East Quadrangle, Montrose County, Colorado
OF-07-06 Geologic Map of the Garo Quadrangle OF-07-06 Geologic Map of the Garo Quadrangle, Park County, Colorado
OF-06-06 Geologic Map of the Palmer Lake Quadrangle OF-06-06 Geologic Map of the Palmer Lake Quadrangle, El Paso County, Colorado
OF-06-07 Geologic Map of the Fairplay West Quadrangle OF-06-07 Geologic Map of the Fairplay West Quadrangle, Park County, Colorado
OF-03-19 Geologic Map of the Manitou Springs Quadrangle OF-03-19 Geologic Map of the Manitou Springs Quadrangle, El Paso and Teller Counties, Colorado
OF-05-03 Geologic Map of the Southern Half of the Culebra Peak Quadrangle OF-05-03 Geologic Map of the Southern Half of the Culebra Peak Quadrangle, Costilla and Las Animas Counties, Colorado
OF-05-04 Geologic Map of the Como Quadrangle OF-05-04 Geologic Map of the Como Quadrangle, Park County, 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-04-06 Geologic Map of the Cherry Valley School Quadrangle OF-04-06 Geologic Map of the Cherry Valley School Quadrangle, Elbert, Douglas, and El Paso Counties, Colorado
OF-04-08 Geological Map of the La Valley Quadrangle OF-04-08 Geological Map of the La Valley Quadrangle, Costilla County, Colorado
OF-04-09 Geologic Map of the Vallecito Reservoir Quadrangle OF-04-09 Geologic Map of the Vallecito Reservoir Quadrangle, La Plata County, Colorado