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.
Paper and pulp manufacturing are forest-based industries. The basic raw material for the pulp and paper industry isthe wood. Softwood of the temperate forests is especially suitable for making pulp and paper.
The Gulf of Guinea is the northeastern most part of the tropical Atlantic Ocean. In this Gulf, there happens the intersection of the Equator and the Prime Meridian (zero degree latitude and longitude).