Barren

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  1. In leaching ores, said of a chemical solution from which valuable solute has been removed by precipitation, ion exchange, or solvent extraction before reuse. Pryor, 1
  2. Said of rock or vein material containing no minerals of value, or of strata without coal, or containing coal in seams too thin to be workable.

Source: Dictionary of Mining, Mineral, and Related Terms


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