Did naturally burning coal mines exist in the Old West? Carl Heyboer Dimondale, Michigan Explorers William Clark and Meriwether Lewis noticed burning coal seams along the Missouri River during their journey west in the early 1800s. These could have been ignited by wildfires. Burning coal mines or coal seams are pretty common today. The Slagle-Bright Diamond coal mine in Colorado has been burning since the 1930s. It’s one of 34 active burning mines in that state alone. Marshall Tri


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