Before revision: wide|Johnson's Shut-Ins panorama A shut-in is an Ozark term for a creek or river that has come into contact with erosion resistant bedrock, frequently causing rock formations within the stream channel that create a complex of pools, rivulets, rapids and plunge pools.
After revision: wide|Johnson's Shut-Ins panorama A shut-in is a type of riverine geologic formation found in the Ozarks where a stream has come into contact with erosion resistant bedrock, frequently creating rock formations within the stream channel result in a complex of pools, rivulets, rapids and plunge pools.