river. 2Cascade: Water descends a series of rock steps. 3Cataract: A large waterfall. 4Fan: Water spreads horizontally as it descends while remaining in contact with bedrock . 5Horsetail: Descending water maintains some contact with bedrock. 6Plunge: Water descends vertically, losing contact with the bedrock surface. 7Punchbowl: Water descends in a constricted