"Geologische Karte der Vereinigten Staaten und Britischen Provinzen von Nord_Amerika", Perthes, Justus

Extremely detailed map with full-color keyed to a legend describing 12 different geological formations. The map was drawn by Jules Marcou, a French geologist and explorer who traveled to the U.S. in 1848. As a geologist for the Pacific Railroad Explorations and Surveys of the 35th parallel, Marcou drew a geological map of the U.S. that extended as far west as the 106th meridian. By 1855 he had returned to Germany, where he produced this map extending the coverage of his earlier map to encompass the entire United States.

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Condition: B

Very fine coloring. Light tide mark through ocean and Gulf of Mexico, not affecting printed image.