"Geological Map of the United States compiled by C.H. Hitchcock and W.P. Blake…", Hitchcock, Charles Henry

A large and colorful map that is completely redrawn from the previous edition that included information identifying railroads, roads, canals, army arsenals and forts. This new edition eliminates much of this information and instead focuses on the geology. A table at lower left provides an explanatory key to the colors used to indicate nine distinct geological formations. The carefully drawn map shows good geographical detail as well as the remarkable geological information. An interesting contrast from the 1873 edition that was offered in our last auction.

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Condition: A

Great color and strong, bold impression. Short split at bottom of fold.