Plunge pool softer or fractured rock has been eroded back to a knickpoint, water continues to bombard its base. Because this rock is often less resistant than overlying strata, the water from the higher elevation continues eroding downward until an equilibrium is achieved. A somewhat similar bowl-shaped feature developed by flowing water, as opposed to falling water, is known as a scour hole. These occur both naturally and as a result of bridge building. Plunge pool A plunge pool (or plunge basin or waterfall lake) is a deep depression in a stream bed at the base of a waterfall or shut-in. It
Chute (gravity) fed, hence chutes. These include aqueducts, puquios, and acequias. Chutes are in common use in tall buildings to allow the rapid transport of items from the upper floors to a central location on one of the lower floors or basement. Chutes may be round, square or rectangular at the top and/or the bottom. An elevator is not a chute since it does not operate by means of gravity. Goust, a hamlet in southwestern France, is notable for its mountainside chute that is used to transport coffins. Chutes are also found in: Chute (gravity) A chute is a vertical or inclined