Home > Term: pit shale
pit shale
The name given to the shale from a drift opened in the side of the ravine at a level 62 ft (18.9 m) below that of the Pittsburgh coal seam.
- ส่วนหนึ่งของคำพูด: noun
- อุตสาหกรรม/ขอบเขต: Mining
- Category: General mining; Mineral mining
- Government Agency: USBM
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ผู้สร้าง
- ed.young
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(V.I.P) 21084 points - 100% positive feedback
(Milwaukee, United States)
