Colorado, 1891
A map from 1891 of Colorado showing the State capital of Denver, major cities and towns, railroads, the Rockies and other mountain systems, lakes, and rivers....

Colorado, 1892
A map from 1892 of Colorado showing the State capital of Denver, counties and county seats, major cities and towns, railroads, mountain systems, lakes, and rivers....

Colorado, 1902
A map from 1902 of Colorado showing the State capital of Denver, counties, major cities and towns, railroads, the Rockies and other mountain systems, lakes, and rivers....

Georgetown District, 1906
A contour map from a portion of the USGS Georgetown quadrangle (1906) showing the present topography of the Georgetown district of Colorado. Contour intervals are 500 feet....

Georgetown District Upland Restored, 1906
A contour map from a portion of the USGS Georgetown quadrangle (1906) showing the assumed older topography of the Georgetown district of Colorado with older montainous upland features restored. Contour intervals are 500 feet....

Colorado, 1906
A map from 1906 of Colorado showing the State capital of Denver, major cities and towns, railroads, the Rockies and other mountain systems, lakes, and rivers....

Colorado, 1909
A map from 1909 of Colorado showing the State capital of Denver, major cities and towns, railroads, the Rockies and other mountain systems, lakes, and rivers....

Southern Rockies, 1911
A map from 1911 of the southern Rockies showing the main topographic features of the region, including; the eastern foothills (hogback topography); the Colorado or Front Range and Wet Mountains; the Park, Sawatch (or Saguache), and Sangre de Cristo r...

Colorado Front Range, 1911
A map from 1911 of a portion of the Front Range in Colorado north of Denver showing the geologic feature of cross folding ‘en échelon’, (short linear features that overlap in a line running obliquely to the strike of the individual...

Denver Basin, 1911
A geologic map of a section of the Colorado Front Range near Denver and Golden showing the structure and topography of the common border between the Great Plains and Southern Rockies. The map is keyed to show rock types, formations, and fault lines o...