Coal in the Fort Union Formation and equivalent rocks is a valuable resource because the coal beds and zones within these stratigraphic units are thick, and the coal is clean and compliant (low in ash, low in sulfur, and relatively low in concentrations of trace elements of environmental concern named in the Amendments to the 1990 Clean Air Act).
(Coal in the Fort Union Formation and equivalent rocks; is; a valuable resource; because the coal beds and zones within these stratigraphic units are thick) (the coal beds and zones within these stratigraphic units; are; thick) (the coal; is; clean and compliant (low in ash, low in sulfur, and relatively low) (environmental concern; named; L:in the Amendments to the 1990 Clean Air Act)
Coal in the Fort Union Formation and equivalent rocks the coal beds and zones within these stratigraphic units the coal environmental concern
is are is named
a valuable resource because the coal beds and zones within these stratigraphic units are thick
thick
clean and compliant (low in ash, low in sulfur, and relatively low
L:in the Amendments to the 1990 Clean Air Act