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wall rock

noun, Mining.
the rock forming the walls of a vein.
Origin of wall rock
1855-60, Americanism Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for wall rock
  • Gold is present as free grains in quartz, as blebs attached to wall rock ribbons, and in veinlets cutting sulfide grains.
  • The magma was dry and viscous as it invaded the metamorphic rocks and caused wholesale plastic folding of the wall rock structure.
  • Fluid-wall rock interaction increased fluid pH, causing precipitation of uranium minerals.
  • New geochemical evidence from the wall rock-vein contact will also be explored.
  • Hanging wall rock is reddish and oxidized, footwall rock is greenish gray and chloritic.
  • Characterization of pit wall rock has indicated that degradation of water contacting this wall rock would not occur.
  • When movement occurs along a fault the wall rock is smoothed, polished and grooved in a direction parallel to the displacement.
  • Weak sericite-silica alteration of wall rock is sometimes present around barite-fluorite veins.
British Dictionary definitions for wall rock

wall rock

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