OF-23-04 Geologic Map of the Milton Reservoir Quadrangle OF-23-04 Geologic Map of the Milton Reservoir Quadrangle, Weld County, Colorado
OF-21-03 Geologic Map of the Dry Creek Quadrangle OF-21-03 Geologic Map of the Dry Creek Quadrangle, Delta County, Colorado
OF-20-02 Geologic Map of the Agate Mountain Quadrangle, Park County, Colorado OF-20-02 Geologic Map of the Agate Mountain Quadrangle, Park County, Colorado
OF-23-06 Geologic Map of the Wiggins Quadrangle OF-23-06 Geologic Map of the Wiggins Quadrangle, Morgan County, Colorado