Being from Michigan,we learned about iron mining almost as soon as we learned about Michigam History. The great lakes has always been a big market in iron ore shipping. Building Automobiles in Detroit and watching the ore freighters on the great lakes has always been a big history part of Michigan. I prefer Gold ore myself.lol. Iron is probably found in every state. Nothing like standing on huge piles of iron ore at a dock side in the UP,watching the rail cars dump ore in the freighters!