beach A stretch of sand, shingle, gravel, and other material along the shore of a lake, river, or sea. Caused by erosion and deposition of sediment by waves, a beach usually extends from the furthest point reached by the waves out to a water depth of around 10 meters. Related category GEOLOGY AND PLANETARY SCIENCE Source: U.S. Geological Survey Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) |