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British Dictionary definitions for burnt shale

burnt shale

noun
  1. carbonaceous shale formed by destructive distillation of oil shale or by spontaneous combustion of shale after it has been some years in a tip: sometimes used in road making
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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