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coal measures

plural noun, Geology
coal-bearing strata.
(initial capital letters) in Europe, a portion of the Carboniferous System, characterized by widespread coal deposits.
Origin of coal measures
1655-65 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Coal Measures

plural noun the Coal Measures
a series of coal-bearing rocks formed in the upper Carboniferous period; the uppermost series of the Carboniferous system
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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