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The Epic Interactive Encyclopedia 1998
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Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso
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Iron_ore
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1992-09-02
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14 lines
Any mineral from which iron is extracted. The
chief iron ores are magnetite, a black oxide;
hematite, or kidney ore, a reddish oxide;
limonite, a black hydro-oxide; and siderite,
a brownish carbonate. Iron ores are found in
a number of different forms, including
distinct layers in igneous intrusions, as
components of contact metamorphic rocks, and
as sedimentary beds. Much of the world's iron
is extracted in the USSR. Other important
producers are the USA, Australia, France,
Brazil, and Canada; over 40 countries produce
significant quantities of ore.