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-04-05 Geologic Map of the Castle Rock South Quadrangle OF-04-05 Geologic Map of the Castle Rock South Quadrangle, Douglas County, Colorado
OF-04-04 Geologic Map of the Buena Vista East Quadrangle OF-04-04 Geologic Map of the Buena Vista East Quadrangle, Chaffee County, Colorado
OF-01-01 Geologic Map of the Castle Rock Gulch Quadrangle OF-01-01 Geologic Map of the Castle Rock Gulch Quadrangle, Chaffee and Park Counties, 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-02-04 Geologic Map of the Monument Quadrangle OF-02-04 Geologic Map of the Monument Quadrangle, El Paso County, Colorado
OF-96-02 Geologic Map of the Center Mountain Quadrangle OF-96-02 Geologic Map of the Center Mountain Quadrangle, Garfield County, Colorado