- Mining. the top of the rock stratum underlying a vein or bed of ore.Compare hanging wall(def 1).
- Geology. a mass of rock lying beneath a fault plane.
Origin of footwall
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for footwall
The total area of ore measured on the footwall was 785 acres.
But the hardest rock of the hanging or footwall, however, is seldom as hard as the harder class of ore.
To these timbers are fixed small timbers along the footwall, to which are fastened the lagging and ladders.
Stringers are given the same characteristics as veins, but divided into hanging, footwall, and other varieties.
The ratio of ore area to total explored area, measured in the plane of the footwall, was 21-½ per cent.
- the rocks on the lower side of an inclined fault plane or mineral veinCompare hanging wall
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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