Footwall meaning

fo͝otwôl
The mass of rock underlying a mineral deposit in a mine.
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The underlying block of a fault having an inclined fault plane.
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The block of rock lying under an inclined geologic fault plane.
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(geology) The section of rock that extends below a diagonal fault line (the corresponding upper section being the hanging wall).
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The side beneath an inclined fault, vein, lode, or other type of ore body.
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Origin of footwall