: a bed of coal usually thick enough to be profitably mined
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Once lit, the underground coal fires can reach temperatures of up to 1,000 degrees and can spark surface fires in return, as happened at a coal seam in 2005.—Tom Howarth
follow, Newsweek, 30 Oct. 2024 Crews will excavate down to the coal seam that is 6 to 8 feet thick, bringing the smoldering material to the surface.—Tom Howarth
follow, Newsweek, 30 Oct. 2024 Cowboy Clean Fuels, a startup injecting sugar beet waste into coal seams, initially focused on the state because Wyoming has ample coal seams in its Powder River Basin.—Katie Fehrenbacher, Axios, 13 Aug. 2024 After knocking down trees, energy firms would literally blast the tops off mountains in search of coal seams, carelessly dumping rubble in nearby streams.—Benji Jones, Vox, 18 June 2024 See all Example Sentences for coal seam
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