Geological Map of Bassick Hill and Vicinity, Colo.

Whitman Cross

Editore: USGS, 1896

Geological Map of Bassick Hill and Vicinity, Colo. Enlarged from General Map Plate XXVI. Whitman Cross, U. S. Geological Survey, 1896. *** A chromolithograph map of the geology and mines in the area of Mt. Tyndall and Bassick Hill, Silver Cliff, Colorado. Mines on the map include Mountain Boy, Poorman, Golden Gate, Empire State, P & O, plus something called Centennial Tunnel. Color map key on right side of map. Note the locations of the mines are not present in the Trachyte and Rhyolite formations. Besides Centennial, there are three (3) other unnamed tunnels on this map. These were long horizontal shafts that branched off a vertical shaft from the surface. There were numerous mining tunnels named ?Centennial? in the latter 1800's. *** Clean, clear image with bright colors, blank verso, one center vertical fold, as issued. Wide margins with bumped corners reinforced on verso with archival tape to prevent chipping. *** Sheet is 11.25 inches high by 14.25 inches. Image, including lettering, is 9.25 inches high by 11 inches. Will be shipped folded. Codice articolo M5090

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Titolo: Geological Map of Bassick Hill and Vicinity,...
Casa editrice: USGS
Data di pubblicazione: 1896
Legatura: No Binding
Condizione: Near Fine