Which among the following statements is not correct about Plunge pool?

• A. They are often very deep, generally related to the height of fall and the volume of water,
• B. It is a deep depression in a stream bed at the base of a waterfall
• C. It is created by the erosional forces of cascading water
• D. They occur at the mature stage of the river development

Answer: (D)

Plunge pool or waterfall lake is a deep depression in the stream bed at the base of the waterfall. It is created by the erosional force of the cascading water. They occur at the youthful stage of the river development.