Coastal Deposition Landforms: Features and Formation. Material that is transported by the waves along a coastline is eventually deposited forming distinctive deposition features. There are four main deposition features that you need to learn the formation of. These are: 1. Beaches. 2. Spits. 3. Bars. 4. Tombolos. Beaches Beaches are the main feature of deposition found at the coast, these consist of all the material (sand, shingle etc.) that has built up between the high and low tide mark.