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==== Mines in the United States ==== | ==== Mines in the United States ==== | ||
The largest Coal Producing States in 1889 were Pennsylvania, Illinois, Ohio, West Virginia, Iowa, Alabama, Indiana, Colorado, Kentucky, Kansas and Tennessee <ref>Source: ''Thirteenth Census of the United States, Vol. XI, Mines and Quarries, 1913,'' Table 4, p. 187. As quoted in Wikipedia ''History | The largest Coal Producing States in 1889 were Pennsylvania, Illinois, Ohio, West Virginia, Iowa, Alabama, Indiana, Colorado, Kentucky, Kansas and Tennessee <ref>Source: ''Thirteenth Census of the United States, Vol. XI, Mines and Quarries, 1913,'' Table 4, p. 187. As quoted in Wikipedia ''History of Coal in the United States'' | ||
For a more complete list of copper mines in the United States visit the Wikipedia article entitled: [http://en.wikipedia.org/wiki/Copper_mining_in_the_United_States Copper mining in the United States] | For a more complete list of copper mines in the United States visit the Wikipedia article entitled: [http://en.wikipedia.org/wiki/Copper_mining_in_the_United_States Copper mining in the United States]</ref> | ||