OF-15-09 Geologic Map of the North Delta Quadrangle OF-15-09 Geologic Map of the North Delta Quadrangle, Delta County, Colorado
OF-14-05 Geologic Map of the Corcoran Point Quadrangle OF-14-05 Geologic Map of the Corcoran Point Quadrangle, Mesa County, Colorado
OF-01-04 Geologic Map of the Basin Mountain Quadrangle OF-01-04 Geologic Map of the Basin Mountain Quadrangle, La Plata County, Colorado