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Article: A 2008 Lake Superior Bonanza of copper crystals Keweenaw Co., MI: fourteenth in a series of articles on the mines and minerals of Michigan's copper country.
- Article from:
- Rocks & Minerals
- Article date:
- January 1, 2009
- Author:
CopyrightCOPYRIGHT 2009 Heldref Publications. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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[FIGURE 1 OMITTED]
On 11 August 2008 a fabulous find of crystallized copper was made in shallow water on the bottom of Lake Superior near Eagle Harbor, Keweenaw County, Michigan. The near-shore find, now called the Laker Pocket, was located in a fissure vein cutting the Lake Shore Traps; it was discovered by Bob Barron and Karl Peterson, both seasoned scuba divers with twenty years' experience in exploring the depths of Lake Superior. The two-day recovery of the contents of the pocket netted more than three hundred groups of copper crystals ranging in size from large-cabinet specimens to microcrystal groups.
Geology
Part of the arch-shaped ...
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