Landforms are created by deposition. The major deposition landforms are beaches, spits and bars. Beaches are the areas of sand, pebbles and shingle that are formed by deposition produced by wave processes. The rocks and cliffs are being continually weathered, eroded and moved. Deposition occurs when wave velocities slow, or when ocean currents slow due to encountering frictional forces such as the sea bed, other counter currents and vegetation. Deposition occurs faster in sheltered bays.