footwall

American  

[foot-wawl] / ˈfʊtˌwɔl /

noun

1. Mining. the top of the rock stratum underlying a vein or bed of ore.

2. Geology. a mass of rock lying beneath a fault plane.

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footwall British  

/ ˈfʊtˌwɔːl /

noun

1. the rocks on the lower side of an inclined fault plane or mineral vein Compare hanging wall

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footwall Scientific  

/ ft′wôl′ /

1. The block of rock lying under an inclined geologic fault plane.

2. See more at fault Compare hanging wall

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Etymology

Origin of footwall

First recorded in 1640–50; foot + wall

Compare meaning

How does footwall compare to similar and commonly confused words? Explore the most common comparisons:

• hanging wall vs. footwall

Example Sentences

See Examples For:

footwall

Normal faults form when the hanging wall moves down relative to the footwall.

From Textbooks ● Jan. 1, 2017

In a dip-slip system, the footwall is below the fault plane and the hanging wall is above the fault plane.

From Textbooks ● Jan. 1, 2017

If the fault develops in a situation of extension, then it will be a normal fault, because the extension allows the hanging wall to slide down relative to the footwall in response to gravity.

From Textbooks ● Jan. 1, 2015

The terms hanging wall and footwall in the diagrams apply to situations where the fault is not vertical.

From Textbooks ● Jan. 1, 2015

Each sits upon small boards fixed securely from the footwall to the hangingwall, or if the vein is a soft one, sometimes on a wedge-shaped plank fixed on to the vein itself.

From De Re Metallica, Translated from the First Latin Edition of 1556 by Agricola, Georgius