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footwall

Upper-Intermediate (B2)

IPA: /ˈfʊtˌwɔl/

KK: /ˈfʊtˌwɔl/

noun
Definition

The mass of rock that is located below a mineral deposit or an inclined fault in geology.


Example

The miners carefully examined the footwall to ensure it was stable before proceeding with the extraction.


Conversation
Sloth A
Did you know the footwall is crucial in mining operations?
Sloth B
Really? I didn't know that it plays such an important role.
Sloth A
Yeah, it supports the ore deposit above it, making it safer to extract.
Sloth B
That's fascinating! I never thought about the geology behind it.

Synonyms & Antonyms
Synonyms
substratum
underlayer
basement
Antonyms
overburden
overlayer
caprock
Root Explanation

Footwall → The word is formed from "foot" (from Old English "fōt", meaning the lower part of the leg or the part of the body used for standing and walking) and "wall" (from Old English "weall", meaning a structure that encloses or supports). The term "footwall" refers to the wall or rock layer that is located beneath a fault in geological formations, metaphorically likening it to the supportive structure beneath the foot.

Memory Tip

Think of the 'foot' as the part of the body that supports you, and the 'wall' as a structure that provides support. This helps you remember that a footwall is the supportive rock layer beneath a fault.

Visually Confused Words
outwall
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