hanging wall vs. footwall
noun
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Mining. the underside of the wall rock overlying a vein or bed of ore.
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Geology. a mass of rock overhanging a fault plane.
[foot-wawl]
/ ˈfʊtˌwɔl /
noun
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Mining. the top of the rock stratum underlying a vein or bed of ore.
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Geology. a mass of rock lying beneath a fault plane.
