A crescent-shaped sand dune with arms that extend downwind on either side of an obstruction. It results from the accumulation of sand on the upwind side of the obstruction.
Geography
A ridge of irregular sand dunes, typically found adjacent to beaches on low-lying coasts, and partially covered with vegetation. Hesp (2002) Geomorph. 48, 1 reviews the initiation, dynamics, geomorphology, and evolution of foredunes.