Sٍedimentary manganes and iron ore deposits
Nov 23, 2015· SEDIMENTARY MANGANES And IRON ORE DEPOSITS Most of the world''s iron and manganese are derived from deposits of this type. These deposits are very large in size (thousands of millions of tons) and are usually mined by opencut methods. Sedimentary iron and manganese ores are deposited in both fresh and marine water, in bogs, swamps, marshes ...
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