"Geological map of the Lake Superior Land District in the State of Michigan", U.S. Government
Period: 1847 (circa)
Color: Hand Color
39 x 25.8 inches
99.1 x 65.5 cm
A striking map showing the geology of Upper Michigan Peninsula, Isle Royale and the north shore of Lake Superior. Indicates copper, iron, silver, marble furnaces, iron forages and active/inactive mines. Prepared by J.W. Foster & J.D. Whitney pursuant to an Act of Congress approved March 1, 1847 entitled an "Act to establish a new land District for the sale of mineral lands in the State of Michigan." Color code explanation upper right.
Fine coloring and dark impression. Issued folding, now pressed and backed with archival tissue. Light text offsetting in blank area and a little fold toning. Closed puncture in blank area near legend, else very good.