Home > Term: underearth
underearth
A hard fireclay forming the floor of a coal seam. See: underclay.
- Ordklass: noun
- Bransch/domän: Mining
- Category: General mining; Mineral mining
- Government Agency: USBM
0
Skapad av
- ed.young
-
(V.I.P) 21084 points - 100% positive feedback
(Milwaukee, United States)
