OF-19-02 Geologic Map of the Gowanda Quadrangle OF-19-02 Geologic Map of the Gowanda Quadrangle, Weld County, Colorado
OF-21-04 Geologic Map of the Hardin Quadrangle OF-21-04 Geologic Map of the Hardin Quadrangle, Weld County, Colorado
OF-19-05 Geologic Map of the Hells Kitchen Quadrangle OF-19-05 Geologic Map of the Hells Kitchen Quadrangle, Delta and Mesa Counties, Colorado
OF-20-05 Geologic Map of the Greeley Quadrangle OF-20-05 Geologic Map of the Greeley Quadrangle, Weld County, Colorado
OF-20-03 Geologic Map of the Bracewell Quadrangle OF-20-03 Geologic Map of the Bracewell Quadrangle, Weld County, Colorado
OF-18-05 Geologic Map of the Antero Reservoir NE Quadrangle OF-18-05 Geologic Map of the Antero Reservoir NE Quadrangle, Park County, Colorado
OF-18-04 Geologic Map of the Florence Quadrangle OF-18-04 Geologic Map of the Florence Quadrangle, Fremont County, Colorado
OF-19-03 Geologic Map of the La Salle Quadrangle OF-19-03 Geologic Map of the La Salle Quadrangle, Weld County, Colorado
OF-18-03 Geologic Map of the Lands End Quadrangle OF-18-03 Geologic Map of the Lands End Quadrangle, Mesa County, Colorado
OF-18-02 Geologic Map of the Milliken Quadrangle OF-18-02 Geologic Map of the Milliken Quadrangle, Weld County, Colorado
OF-18-01 Geologic Map of the Frederick Quadrangle OF-18-01 Geologic Map of the Frederick Quadrangle, Weld and Broomfield Counties, Colorado
OF-17-05 Geologic Map of the Fountain Quadrangle OF-17-05 Geologic Map of the Fountain Quadrangle, El Paso County, Colorado