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-01-05 Geologic Map of the Georgetown Quadrangle OF-01-05 Geologic Map of the Georgetown Quadrangle, Clear Creek County, Colorado
OF-00-02 Geologic Map of the Idaho Springs Quadrangle OF-00-02 Geologic Map of the Idaho Springs Quadrangle, Clear Creek 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