coal measures

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:
1655–65

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

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