Source : WordNet®

outcrop
     n : the part of a rock formation that appears above the surface
         of the surrounding land [syn: {outcropping}, {rock
         outcrop}]
     [also: {outcropping}, {outcropped}]

outcrop
     v : appear on the surface, come to the surface on the ground;
         "Big boulders outcropped"
     [also: {outcropping}, {outcropped}]

outcropped
     See {outcrop}