coal seam

noun

1. a bed of coal.

Word History and Origins

Origin of coal seam¹

First recorded in 1840–50

Example Sentences

Nearly a decade ago, the University of Queensland hired Rifkin to determine how communities in a rural area were being affected by development to extract natural gas from underground coal seams.

From MIT Technology Review

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