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Colorful map of the United States, exhibiting the geological regions, including Eozoic, Silurian, Deonian and Lower Carboniferous, Coal Measures and Permo-Carboniferous, Triassic and Jurassic, Cretaceous, Teritiary, Alluvium and Volcanic, each coded by color.

An important early geological map, which would be copied by a number of major commercial map makers over the next several years.

Condition Description
Several areas of loss along right fold, most notably at top margin