Definitions for "Coal Seam"
Keywords:  stratum, bed, ohio, thick, five
a bed or stratum of coal usually about five feet thick in Ohio.
A stratum or bed of coal
Keywords:  seam, swamp, strata, layer, geological
Descriptive term for individual layers of coal found in the geological strata.
Coal deposits occur in layers. Each layer is called a "seam."
a seam of coal
A mass of coal, occurring naturally at a particular location, that can be commercially mined.