Subsurface coal naturally burns in some places, like here on Smoky Mountain (!) in the Kaiparowits Plateau, Utah, forming huge apparently bottomless fissures belching fumes (left), and vast landscapes of baked red clinker from ancient underground coal fires (distance). How ancient? Hmmm... #clinker #geology #Kaiparowits #smokymountainroad
#smokymountainroad — Public Fediverse posts
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