"Gray's Geological Map of the United States by Charles H. Hitchcock Ph.D. Professor Geology in Dartmouth College", Gray, Ormando Willis & Son
Subject: United States
Period: 1881 (published)
Publication: The National Atlas
Color: Hand Color
26.7 x 16.1 inches
67.8 x 40.9 cm
Very striking and graphic stone engraved thematic map that details the geological formations throughout the United States. The nine different geological structures are shown through fine coloring accomplished in free-hand. Locates Eozoic, Silurian, Devonian and Lower Carboniferous, Coal Measures and Permo-Carboniferous, Triassic and Jurassic, Cretaceous, Tertiary, Alluvium, and Volcanic. Includes political boundaries, major cities and watershed.
Dark impression and bright original color. Hint of toning along centerfold, still very good.