Curated OER
Educational Technology Clearinghouse: Maps Etc: 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.
Curated OER
Etc: Maps Etc: 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.
Curated OER
Educational Technology Clearinghouse: Maps Etc: Highwood Mountains, 1911
A contour map showing the topography of the Highwood Mountains, Montana. The contour intervals are 200 feet.