: a bed of coal usually thick enough to be profitably mined
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The short version is that methane is embedded in coal deposits, and as miners dig to expose coal seams, the gas escapes, and continues to do so long after a coal mine reaches the end of its operating life.—Umair Irfan, Wired News, 21 June 2025 The short version is that methane is embedded in coal deposits and as miners dig to expose coal seams, the gas escapes, and continues to do so long after a coal mine reaches the end of its operating life.—Umair Irfan, Vox, 7 Dec. 2018 In Jharia, India, a 1916 or so underground coal seam fire prompted the evacuation of over 100 thousand people.—Joe Salas
june 08, New Atlas, 8 June 2025 Those programs have recently grown in importance, as thinning coal seams force mining operations to dig through thicker layers of sandstone – a process that creates more silica dust, which has led to a steep rise in irreversible lung damage.—Bob Ortega, CNN Money, 4 June 2025 See All Example Sentences for coal seam
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