Geologic history of natural coalbed fires, Powder River basin, .
WEBJul 12, 2004 · Map of eastern flank of Powder River basin in Wyoming, showing relation of clinker to active coal mines. Modified from Plate 1 in Heffern and Coates, 2000. Download : Download fullsize image; Fig. 13. ... Unit train of coal leaving mine in Powder River basin. Track cuts through outcrop of clinker formed by natural burning of WyodakAnderson ...