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-22-08 Geologic Map of the Windsor Quadrangle OF-22-08 Geologic Map of the Windsor Quadrangle, Larimer and Weld Counties, 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
OF-21-02 Geologic Map of the Valley View School Quadrangle OF-21-02 Geologic Map of the Valley View School Quadrangle, Weld County, Colorado
OF-20-04 Geologic Map of the Cedaredge Quadrangle OF-20-04 Geologic Map of the Cedaredge Quadrangle, Delta County, Colorado
OF-22-02 Geologic Map of the Brighton Quadrangle OF-22-02 Geologic Map of the Brighton Quadrangle, Adams County, Colorado
OF-22-11 Geologic Map of the Mount Evans Quadrangle OF-22-11 Geologic Map of the Mount Blue Sky (formerly Mount Evans) Quadrangle, Clear Creek and Park Counties, Colorado
OF-20-06 Geologic Map of the Kersey Quadrangle OF-20-06 Geologic Map of the Kersey Quadrangle, Weld County, Colorado
OF-21-01 Geologic Map of the Barnesville Quadrangle OF-21-01 Geologic Map of the Barnesville Quadrangle, Weld County, Colorado