Tombolo

• Tombolos are formed due to longshore drift.
• Swash is where waves, driven by prevailing wind push materials up the beach at an angle.
• The returning backwash is dragged back by gravity down the beach at right angles.
• Spits forms when there is a change in direction on a coastline allowing a sheltered area for deposition
• Material slowly builds up to appear above the water
• A tombolo is formed when a sand spit extends out from the mainland and connects to an island.
• The island provides a sheltered area for deposition.