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Monday, 05/19/2014 3:02:00 PM

Monday, May 19, 2014 3:02:00 PM

Post# of 3480
I just googled the worlds largest iron ore mines and found one listed as the worlds largest Open Pit Iron Ore mine in Northern Minnesota called "Grand Canyon of the North". It is 3 miles long by 2 miles wide and 540 feet deep. More or less the same size as just one of the three "anomalies" found on the TNGL iron ore mine in Mexico. And the Grand Canyon mine, at its peak in the early 1940's was providing nearly a quarter of all US mined iron ore.

http://www.roadtripamerica.com/roadside/Minnesota-Hibbing-Hull-Rust-Mine.htm