OF-08-17 Geologic Map of the Larkspur Quadrangle OF-08-17 Geologic Map of the Larkspur Quadrangle, Douglas and El Paso Counties, Colorado
OF-06-08 Geologic Map of the Russellville Gulch Quadrangle OF-06-08 Geologic Map of the Russellville Gulch Quadrangle, Douglas and Elbert Counties, Colorado
OF-05-07 Geologic Map of the East Half of the Larkspur Quadrangle OF-05-07 Geologic Map of the East Half of the Larkspur Quadrangle, Douglas and El Paso Counties, Colorado
OF-03-09 Geologic Map of the Greenland Quadrangle OF-03-09 Geologic Map of the Greenland Quadrangle, Douglas and El Paso Counties, Colorado
OF-03-08 Geologic Map of Falcon NW Quadrangle OF-03-08 Geologic Map of Falcon NW Quadrangle, El Paso 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-02-04 Geologic Map of the Monument Quadrangle OF-02-04 Geologic Map of the Monument 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-01-03 Geologic Map of the Pikeview Quadrangle OF-01-03 Geologic Map of the Pikeview Quadrangle, El Paso County, Colorado
OF-00-03 Geologic Map of the Colorado Springs Quadrangle OF-00-03 Geologic Map of the Colorado Springs Quadrangle, El Paso County, Colorado