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n. An outcrop.

n. the part of a rock formation that appears above the surface of the surrounding land

"The outcropping was the first significant rock feature early explorers came across as they traveled up the Arkansas River in the 1720s."

outcropped    outcropping    outcrops   

appear   

outcropping    outcropped   

basset    emergence    gossan    emerge   

outcropping    escarpment    overhang    crag    monolith    boulder    mountainside    bluff    bowlder    promontory