Former rich sources of iron ore are completely depleted.

This rock unit had been economically important as a source of iron ore, but is now more notable for its dinosaur fossils.

The municipality is Mexico's largest single source of iron ore.

Prehistoric societies used laterite as a source of iron ore.

Particularly in the twentieth century, it has been of economic importance as a source of iron ore, but is now worked much less.

Wadhurst Clay was formerly an important source of iron ore.

Corus was fighting to keep its productions costs under control and was on the look out for sources of iron ore.

This works was developed by England originally as a source of iron ore.

The last ingredient needed for the steelmaking process was a reliable source of iron ore.

After the arrival of the railroad in 1883, the county became a major source of iron ore.