Iron ore - Wikipedia
Iron-ore mining methods vary by the type of ore being mined. There are four main types of iron-ore deposits worked currently, depending on the mineralogy and geology of the ore deposits. These are magnetite, titanomagnetite, massive hematite and pisolitic ironstone deposits. Banded iron formations. 2.1-billion-year-old rock showing banded iron formation. Processed taconite pellets with reddish