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Keweenaw Peninsula, Michigan

#105 of 167 in Nature in Michigan
The Keweenaw Peninsula is the northernmost part of Michigan's Upper Peninsula. It projects into Lake Superior and was the site of the first copper boom in the United States. As of the 2000 census, its population was roughly 43,200. Its major industries are now logging and tourism, as well as jobs related to Michigan Technological University and Finlandia University.NaturalThe ancient lava flows of the Keweenaw Peninsula were produced during the Mesoproterozoic Era as a part of the Midcontinent Rift. This volcanic activity produced the only strata on Earth where large-scale economically recoverable 97 percent pure native copper is found.Much of the native copper found in the Keweenaw comes in either the form of cavity fillings on lava flow surfaces which has a lacy consistency, or as "float" copper, which is found as a solid mass. Copper ore may occur within conglomerate or breccia as void or interclast fillings. The conglomerate layers occur as interbedded units within the volcanic pile.The Keweenaw Peninsula and Isle Royale, formed by the Midcontinent Rift System, are the only sites in the country with evidence of prehistoric aboriginal mining of copper. Artifacts made from this copper by these ancient Indians were traded as far south as present-day Alabama. These areas are also the unique location where Chlorastrolite, the state gem of Michigan, can be found.
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Keweenaw Peninsula Reviews
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TripAdvisor Traveler Rating 5.0
25 reviews
  • been there in summer, fall and winter....loved all the trips. nice views of the lake in summer....nice colors in the fall as well as a beautiful blue lake....but really love the abundant snow for sled...  more »
  • It so very beautiful in the Keweenaw penninsula. Leaf changing season is like no other.One of the most popular times of year around the peninsula.  more »
  • We lived in Eagle Harbor many years ago. My husband was in charge of the Coast Guard station lighthouse. It was an amazing experience. A beautiful area and perfect vacation spot.
  • What a beautiful area of the UP! I can't wait to go back again.

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