Geological Survey of Michigan—The Upper Peninsula—Copper bearing rocks 1873 map
£280
SKU: P-8-006539
'Geological Survey of Michigan—Map of the Upper Peninsula'
A large and important 19th-century geological map of Michigan’s Upper Peninsula, issued by the Geological Survey of Michigan in 1873, at the height of iron and copper exploitation in the Lake Superior region. Finely hand-coloured to show geological formations, the map is accompanied by a detailed legend identifying copper-bearing rocks, iron-bearing formations, and associated stratigraphy, reflecting its practical purpose as mining intelligence rather than purely academic geology. It covers the key mining districts of the Upper Peninsula, including the Keweenaw Peninsula, Marquette, and Menominee ranges, with coastlines, rivers, and settlements clearly delineated. Produced during the formative period of large-scale copper and iron mining, the map represents an authoritative early synthesis of the region’s mineral geology and is particularly sought after by collectors of American mining history, Lake Superior copper, and 19th-century geological surveys.
Size 44 x 72 cm | 17.5 x 28.0 inches
Date Published: 1873
Type: Antique colour geological map
Author: Geological Survey of Michigan
Publication: Geological Survey of Michigan
Condition: Good |
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