Blind
From WebRef.org
Jump to navigationJump to search - To drill with the circulation medium (water or drill mud) escaping into the sidewalls of the borehole and not overflowing the collar of the drill hole. Long
- An underground opening not connected with other workings nearby and at about the same elevation. Long
- Said of a mineral deposit that does not crop out. The term is more appropriate for a deposit that terminates below the surface than for one that is simply hidden by unconsolidated surficial debris. Syn: blind vein
Source: Dictionary of Mining, Mineral, and Related Terms
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