dial. Mining. (See quots.)
1747. Hooson, Miner’s Dict., L iij b. Lench. These happen in Shafts or Sumps, and may happen by the Vein taking some small leap, or by [etc.] … in which Cases the best or softest part of the Vein flyes more to one Hand, and there stands jutting out a part of the Side within the Shaft, Sump or Gate … this we call a Lench.
1886. Cheshire Gloss., Lench, salt-mining term; the middle portion of a seam of rock salt, lying under the Roof Rock; usually from four to six feet thick.
1888. Sheffield Gloss., Lench or Lencheon, a shelf of rock. A Derbyshire word.
