21. A plunge pool forms at the bottom and deepens as a result of hydraulic action and abrasion. 22. Plunge pools can remain after the waterfall has ceased to exist or the stream has been diverted.23. Other causes may be that the plunge pool is obstructed or the water flow is too shallow. 24. Archaeologists found two buildings, one of which housed a hot bath and the other a cold plunge pool . 25. The mosaics decorated the walls of a cold plunge pool in a bath house within a Roman villa. 26. These plunge pools are built to the same evaporative water losses and the need for potable water refilling. 27. These signs of glacial meltwater erosion are a series of potholes or plunge pools in the creek's valley. 28. However, they do come together in limited locations such as plunge pools at the base of the escarpments. 29. It is suggested that the name derives from the ancient practice of ducking witches in the plunge pool . 30. The abrasion of rock by sediment-loaded water sculpted walls and created plunge pools and teardrop-shaped streamlined islands .
