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-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-20-03 Geologic Map of the Bracewell Quadrangle OF-20-03 Geologic Map of the Bracewell Quadrangle, Weld 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-18-02 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
MS-12 Map of Licensed Coal Mines in Colorado as of 01 June 1978 (detail) MS-12 Map of Licensed Coal Mines in Colorado as of 01 June 1978
OF-17-03 Geologic Map of the Berthoud Quadrangle OF-17-03 Geologic Map of the Berthoud Quadrangle, Larimer, Weld, and Boulder Counties, Colorado
OF-17-02 Geologic Map of the Johnstown Quadrangle OF-17-02 Geologic Map of the Johnstown Quadrangle, Larimer and Weld Counties, Colorado