• synonyms

wall rock

noun Mining.
  1. the rock forming the walls of a vein.
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Origin of wall rock

An Americanism dating back to 1855–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for wall rock

Historical Examples of wall rock

  • In narrow lodes, some of the wall-rock must be cut away to get room for the workmen.

    Hittel on Gold Mines and Mining

    John S. Hittell

British Dictionary definitions for wall rock

wall rock

  1. rock that is immediately adjacent to a mineral vein, fault, or igneous intrusion
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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