coal measures

plural noun Geology.
  1. coal-bearing strata.
  2. (initial capital letters) in Europe, a portion of the Carboniferous System, characterized by widespread coal deposits.

Origin of coal measures

First recorded in 1655–65
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for coal measures

Coal Measures

pl n the Coal Measures
  1. a series of coal-bearing rocks formed in the upper Carboniferous period; the uppermost series of the Carboniferous system
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