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footwall

 - 2 dictionary results

foot⋅wall

  [foot-wawl]
Use footwall in a Sentence
–noun
1. Mining. the top of the rock stratum underlying a vein or bed of ore. Compare hanging wall (def. 1).
2. Geology. a mass of rock lying beneath a fault plane.
Origin:
1640–50; foot + wall
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To footwall
foot·wall   (fŏŏt'wôl')   
n.   Geology

  1. The mass of rock underlying a mineral deposit in a mine.

  2. The underlying block of a fault having an inclined fault plane.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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