Marquette Iron Range | mountains, Michigan, United States | Britannica (original) (raw)

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dolomite deposits

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  In Precambrian: Shelf-type sediments
  …as well as in the Marquette Range of Michigan in the United States, in the Aravalli Range of Rajasthan in northwestern India, and at Hamersley and Broken Hill in Australia. Other constituents of these dolomites include evaporites
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mining of taconite

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  In taconite
  …Range in Minnesota and the Marquette Iron Range in Michigan. Recovery of the iron requires fine grinding and concentration of iron-bearing phases, which in turn are formed into pellets suitable for blast furnaces. As high-grade deposits of iron ore have become depleted, taconite deposits have increased in importance as a…
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