This results in a Spit, which is a long narrow piece of sand/shingle which sticks out into the sea/an estuary.
A Bar (or a barrier island) may form where there are changes to coastal direction but no estuary to break the sequence of sedimentation.
The 2 ends of a spit are...
- The Proximal End - end nearest to the shore/land
- The Distal End - end furthest away from the shore/land
-Secondary winds also shape the spit
-A river’s current may stop deposition across the entire estuary
-The river channel may be too deep, or the water may flow too fast
- Sediment is carried by Longshore drift
- Shingle (larger sediment) is deposited behind the headland
- Storm waves move sediment above the high water mark making the feature more prominent
- Finer material is carried to the end of the spit
- Sand dunes may form as the sand dries and is blown around at low tide which stabilizes the spit
- Waves and rivers deposit sand and mud which makes salt marsh
Spurn Head in Humberside is 6km long, 15m hig, and 150m wide