Keys to the Past

Glossary

Ironstone; Iron stone

(FeOOH, Fe2O3, Fe3O4, FeCO3)
General term for the minerals that can be smelted to produce the metal Iron (Fe). This covers a range of types that may exist as iron oxides, hydroxides and carbonates. It may be found in veins or as layers in marshes. This latter type is called bog ore.

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