"Geological Map of Keweenaw Point, Lake Superior Michigan", Foster/Whitney
Period: 1849 (circa)
Publication: Report on the Geological and Mineralogical Survey…
Color: Hand Color
23.2 x 12.2 inches
58.9 x 31 cm
Detailed geological map color-coded and keyed to show the aqueous and igneous formations, mines, furnaces, etc.
References: Karpinsky #765.
Issued folding with faint toning along folds and one tiny spot.