Copper Harpoons from Wisconsin: Milwaukee Public Museum
There are several important sites in Wisconsin and Michigan where ancient copper artifacts were found in human archeological sites which range from about 1000 to about 6000 years in age. The oldest site is near Oconto, termed Archaic in age. Copper tools, including projectile heads, fish hooks, awls, needles and knives are abundant, and younger sites have yielded ornamental copper objects. There were also objects from as far away as the Gulf of Mexico and Yellowstone in the burial remains, which indicates that trading of copper objects may have been occurring over much of North America. This is the earliest geoheritage of the Keweenaw, because it is likely that all this copper was of Keweenawan origin.
Milwaukee Public Museum
