#rock_outcrop__outcrop__outcropping  the part of a rock formation that appears above the surface of the surrounding land
  supertype:  #rock.natural_object__stone  a lump of hard consolidated mineral matter; "he threw a rock at me"
  subtype:  #belay  something to which a mountain climber's rope can be secured
  subtype:  #outthrust  an outcropping of rock that extends outward

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