홈 > Term: farewell rock
farewell rock
The highest rock formation of the Millstone Grit of South Wales, occurring immediately beneath the Coal Measures. Since all workable coal seams occur in the Coal Measures, it is useless to search for coal in these rocks, hence the miner's term.
- 품사: noun
- 분야/도메인: 광업
- 카테고리: 일반 광산; Mineral mining
- Government Agency: USBM
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작성자
- ed.young
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(V.I.P) 21084 포인트 - 100% positive feedback
(Milwaukee, United States)
