out·crop outcrops in AM and sometimes in BRIT, use outcropping An outcrop is a large area of rock sticking out of the ground. an outcrop of rugged granite. out·crop·ping a rock or group of rocks above the surface of the ground
A portion of bedrock or other stratum protruding through the soil level, indicating a fault or some other oil-bearing formation
the part of a rock formation that appears above the surface of the surrounding land appear on the surface, come to the surface on the ground; "Big boulders outcropped
Area of exposed bedrock at the Earth's surface with no overlying deposits of soil or regolith