Subject: Lake Superior, Michigan
Period: 1849 (circa)
Publication:
Color: Hand Color
Size:
24 x 19.5 inches
61 x 49.5 cm
This detailed geological map covers the region from the Keweenaw Bay to the Chocolate River. A color-coded key locates seven geological units, including sandstone, quartz, limestone, schistose and trappean rocks, granite and basalt. There is also good detail of relief shown in hachure. A scale below title converts chains to miles. Fancy title lettering.
References: Karpinski (MI) #787; Marcou & Marcou #369
Condition: B
There is some light offsetting in the image and it is trimmed close to the neatline at top and bottom. Issued folding.