Hayden Maps of 1877

The following six maps are available from the CGS Bookstore as free PDF downloads. Map scale is approximately 1:253,400.

• Geologic Map of Colorado by the Hayden Survey of 1877
• Geologic Map of Southwest Colorado by the Hayden Survey of 1877
• Geologic Map of North-central Colorado by the Hayden Survey of 1877
• Geologic Map of Northwest Colorado by the Hayden Survey of 1877
• Geologic Map of Western Colorado by the Hayden Survey of 1877
• Geologic Map of Central Colorado by the Hayden Survey of 1877

Composite of Hayden’s 1:253,440 geologic maps