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An increasingly important source of iron for commercial uses is taconite , a mixture of hematite and silica.
The Mesabi Iron Range contains some 110 miles of small towns built at the turn of the last century along a seam of iron ore called taconite .
She was loaded with 26,000 tons of taconite at Superior, WI, on Nov.9, 1975 and left the port of Duluth-Superior, at the western end of Lake Superior shortly after 2: 00 p.m. in fair weather but with a foul forecast lying in wait.
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