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Noun: caliche  ku'lee-chee
  1. Crust or layer of hard subsoil encrusted with calcium-carbonate occurring in arid or semiarid regions
    - hardpan
     
  2. Nitrate-bearing rock or gravel of the sodium nitrate deposits of Chile and Peru

Derived forms: caliches

Type of: dirt, rock, soil, stone

Encyclopedia: Caliche