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A Franconia Minerals drill site just off the eastern shore of Birch Lake in the Superior National Forest. Franconia is one four companies that is currently or will soon be drilling for sulfur-bearing metals in northeastern Minnesota. A fifth is done drilling and awaits mining permits.
After reading Jonathan Kaminsky's feature about mining in northeastern Minnesota, check out a photo gallery showing rock being excavated from deep within the earth. Also see Kaminsky's Reporter's Notebook.