wall rock
Americannoun
noun
Etymology
Origin of wall rock
An Americanism dating back to 1855–60
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
All I could make out was the endless ramp, the wall rock, thick cables bolted to the granite, looping on ahead until they disappeared where the headlights lost themselves in the dark air.
From The Wall Street Journal ● Dec. 13, 2013
Association with typical hot-water minerals and hydrothermal alterations of the wall rock are again believed to indicate the origin of the ores through ascending hot solutions from a deep source.
From The Economic Aspect of Geology by C. K. (Charles Kenneth) Leith
The ore fills fissures to some extent, but is mainly a replacement of the wall rock.
From The Economic Aspect of Geology by C. K. (Charles Kenneth) Leith
In mines where the range of values is narrower than the normal stoping width, some wall rock must be broken.
From Principles of Mining Valuation, Organization and Administration by Herbert Hoover
In igneous rock the ore-bearing solutions may have altered the wall rock to a dense mixture of quartz, sericite, and chlorite.
From The Economic Aspect of Geology by C. K. (Charles Kenneth) Leith
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
