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-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-21-01 Geologic Map of the Barnesville Quadrangle OF-21-01 Geologic Map of the Barnesville Quadrangle, Weld County, Colorado
OF-20-06 Geologic Map of the Kersey Quadrangle OF-20-06 Geologic Map of the Kersey Quadrangle, Weld County, Colorado
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