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coal seam
noun
- a bed of coal.
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Word History and Origins
Origin of coal seam1
First recorded in 1840–50
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Example Sentences
The nature of the pavement of the coal seam, particularly as to hardness and softness; and if soft, to what depth it may be so.
From Project Gutenberg
A coal seam with a soft pavement and a hard roof is the most subject to a “creep.”
From Project Gutenberg
A stratum of fire clay commonly underlies a coal seam, and there occur also beds of iron ore.
From Project Gutenberg
The mining engineer, Monsieur Arnaud, was of opinion that on sinking deeper into the coal-seam a better quality would be met with.
From Project Gutenberg
That's how it is you never find anything but shale or slate (which is mud-rock) or sandstone above a coal seam.
From Project Gutenberg
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