Highly detailed geological map of Colorado, from the Hayden's Atlas of Colorado. The map shows excellent detail for the period, especially in the mining regions. Durango is missing, but Animas City is shown, as is Parrott City south of the La Platas. Walsenburg is Cucharas. "Ft. Reynolds is located about 15 miles east of Pueblo. Flawless example with a single fold, on strong paper.