Coal mine dump - pretty AND ugly
The bright red color might be "clinker" - if a coal seam catches on fire, it can bake the overlying shale, oxidizing the iron into rust. Or when the c...
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The bright red color might be "clinker" - if a coal seam catches on fire, it can bake the overlying shale, oxidizing the iron into rust. Or when the coal is mined, pyrite minerals oxidize, producing sulfuric acid, which oxidizes iron compounds.
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