Definition of outcrops:
(n) :
The part of a rock formation that appears at the surface of the ground.
(n) :
A coming out of bedrock or of an unconsolidated deposit to the surface of the ground.
(v) :
(geology, of a stratum) To come out to the surface of the ground.
(n) :
A piece of land that stands out (usually into water) from the land surrounding.