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Copper knife, spearpoints, awls, and spade made from copper deposits mined by Native Americans in Wisconsin from the Late Archaic period, 3000 BC-1000 BC. Native Americans were the first to mine and work the copper of Lake Superior and the Keweenaw Peninsula of northern Michigan between 5000 BCE and 1200 BCE. The natives used this copper to ...
The copper was then pounded out, using rock hammers and stone chisels. [15] The Keweenaw's rich deposits of copper (and some silver) were extracted on an industrial scale beginning around the middle of the 19th century. The industry grew through the latter part of the century and employed thousands of people well into the 20th century.
13-oz. nugget of native copper, Keweenaw County, Michigan.Size 9.5 x 8.6 x 1.7 cm. Native copper from the Keweenaw Peninsula Michigan about 2.5 inches (6.4 cm) long. Copper Country is highly unusual among mining districts in that the copper mined was predominantly in its elemental ("native") form, rather than in the form of compounds (mostly oxides and sulfides) that form the basis of the ...
Sign commemorating the Ontonagon Boulder Location of Ontonagon Boulder. The Ontonagon Boulder (/ˌɒntəˈnɑːɡən ˈboʊldəɹ/, Chippewa: Misko-biiwaabik) is a 3,708-pound (1,682 kg) boulder of native copper originally found in the Upper Peninsula of Michigan, United States, and now in the possession of the Department of Mineral Sciences, National Museum of Natural History, Smithsonian ...
The county is part of Michigan's Copper Country region, an area where copper mining was prevalent from the 1840s to the 1960s. Polished native copper nugget from Keweenaw County. Keweenaw County copper mines were important producers in the late 19th and early 20th centuries. [5] Haven Falls, on Haven Creek near Lac La Belle
The Old Copper Complex of the Western Great Lakes is the best known, and can be dated as far back as 9,500 years ago. [4] [1] Great Lakes natives of the Archaic period located 99% pure copper near Lake Superior, in veins touching the surface and in nuggets from gravel beds.
Opinion: Copper is a great conductor, but pollution and religious rights are important considerations, writes Jane Yoder-Short. Opinion: Copper is a great conductor, but pollution and religious ...
The Delaware Copper Mine is located off U.S. Highway 41 (US 41), 12 miles (19 km) south of Copper Harbor, Michigan. [4] The Delaware Copper Mine provides tours of one of the oldest copper mines in the Keweenaw, [4] dating back to 1846. [18] The mine had five shafts, with the deepest reaching 1,400 feet (430 m). [18]