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
Perilous Plunge Perilous Plunge Perilous Plunge was a shoot-the-Chutes style attraction located at Knott's Berry Farm in Buena Park, California. The ride opened on September 15, 2000, and closed on September 3, 2012. The attraction was based on the pleasure piers of the past along Southern California's famed beaches such as Huntington Beach. 24-passenger boats were towed to a height of where a brief U-turn was taken before a world record water chute into a 650,000-gallon "splashdown" lagoon. On August 13, 2012, Knott's Berry Farm announced that Perilous Plunge would be closing for good on September 3, 2012, in order to make