1. Waves and Wind Shape the Shoreline Shoreline Erosion

2. Waves • Waves pound the rocks and shells creating sand. • The sand on a beach will consist of particles eroded from the surrounding area. • Hawaii's black sand beaches come from the volcanic rock nearby. • White sand beaches come from shells and coral.

3. Longshore Drift • The longshore current ( runs parallel to shore) creates the longshore drift. • Longshore drift moves large amounts of sand along beaches. • Groins are installed to keep sand from drifting.

4. Longshore Drift • cat

5. Sand Trapped By Groins • cat

6. Longshore Current Landforms • Longshore current also transport sand to form sandbars and spits • Spit – is a sand bar that has built up above the waters surface with one end joined to land. • Bay mouth bar- a spit that complete blocks a bay and creates a lagoon • Tombolo – is an island that join to land by a thin strip of sand.

7. Spit • This spit is almost a bay mouth bar

8. Tombolo • cat

9. Barrier Island • Barrier island are formed by erosion and deposition

10. Headland • Headland – an area of coastline that protrudes further into the sea than the surrounding coast.

11. Sea Arch • Sea arches form when softer stone is eroded behind the headland.

12. Sea stack • Stacks form when the roof of a sea arch collapses.