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They smear their bodies with ochre, a reddish pigment extracted from iron ore .
Both siderite and massive pyrite were mapped as noncommercial iron ore by the Eagle mine staff.
In between, the anchors watch stocks in these sectors and pronounce that coal has gone up, or iron ore is flattish.
The underground pursuit of iron ore here did not require timbering because the rock was so hard and dense.
These included vast amounts of iron ore , huge reserves of coal and electricity, and two of the world's largest explosives factories.
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