rock that is immediately adjacent to a mineral vein, fault, or igneous intrusion
wall rock in American English
US
Geology and Mining
the rock mass on either side of a fault or vein
wall rock in American English
noun
Mining
the rock forming the walls of a vein
Word origin
[1855–60, Amer.]This word is first recorded in the period 1855–60. Other words that entered Englishat around the same time include: boilerplate, keyword, kickoff, specialist, superheat