The erosion deposition of the sea waves gives rise to coastal landforms. Seawaves continuously strike at the rocks. Crake develop. Over time they become larger and wider. Thus, hollow like caves on the rocks. They are called sea caves. As these cavities become bigger and bigger only the roof the caves remain, thus forming sea arches. Further, erosion breaks the roof and only walls are left. These wall like features are called stacks. The steep rocky coast rising almost vertically above sea water is called sea cliff. The sea waves deposit sediments along the shores forming beaches.