Home > Term: underearth
underearth
A hard fireclay forming the floor of a coal seam. See: underclay.
- Part of Speech: noun
- Industry/Domain: Mining
- Category: General mining; Mineral mining
- Government Agency: USBM
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Creator
- ed.young
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(V.I.P) 21084 points - 100% positive feedback
(Milwaukee, United States)
