Powder River Basin
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The Powder River Basin is a geologic structural basin in southeast Montana and northeast Wyoming, about 120 miles east to west and 200 miles north to south, known for its extensive coal reserves. The
Powder River Basin and surrounding uplifts (US Geological Survey)
Northeast view of the mile wide Decker coal mine and the Tongue River in the Powder River Basin, southeastern Montana.
Sub-bituminous coal
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Sub-bituminous coal is a lower grade of coal that contains 35–45% carbon. The properties of this type are between those of lignite, the lowest grade of coal, and those of bituminous coal, the second-h
Powder River Basin
…million years, much of the overlying sediment has eroded away, leaving the coal seams near the surface. Powder River Basin (PRB) coal is classified as "sub-bituminous" and contains an average of approximately 8,500 btu/lb, with low sulfur. Contrast this with eastern, Appalachian bituminous coal containing an average…
An American rancher holding a lump of sub-bituminous coal
Coal anthracite