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Federal
Data release for the geologic map of the upper Arkansas River valley region, north-central Colorado
Department of the Interior —
This 1:50,000-scale geologic map represents a compilation of the most recent geologic studies of the upper Arkansas River valley, between Leadville and Salida,... -
Federal
Data release for Geologic Map of the Leadville North 7.5' quadrangle, Eagle and Lake Counties, Colorado
Department of the Interior —
The Leadville North 7.5' quadrangle lies at the northern end of the Upper Arkansas Valley, where the Continental Divide at Tennessee Pass creates a low drainage... -
Federal
Collection of digital structure contour maps from previously published USGS studies
Department of the Interior —
Under the direction and funding of the National Cooperative Geologic Mapping Program (NCGMP) with guidance and encouragement from the United States Geological Survey...