Beaches form in sheltered environments like bays through the processes of deposition. Spits are formed when longshore drift causes sediment to accumulate into narrow extensions of land along a shoreline. Bars are similar to spits but connect two areas of mainland, while tombolos connect an island to the mainland through a double-barred spit formation.

1. Landforms of coastal deposition
1) Beaches
2) Spits
3) Tombolos and Bars

2. Beaches form in sheltered environments, such as
bays. When the swash is stronger than the
backwash, deposition occurs.

3. How are spits formed?

5. Write 1 – 7 underneath your diagram and write the correct label next to the
number.
Fastest flow of river Salt marsh
Fetch
River estuary Original coastline
Direction of longshore drift
Short term changes in wind and wave direction causing the spit to curve.

6. How are spits formed?

7. If a spit joins one part of the mainland to another it is called a bar.
For example, there is a bar at Miami Beach.
What is a bar?

8. On yourdiagramlabel the
following things:
• Old Bay
• Direction of Longshore Drift
• Prevailing Wind
• A BAR is formed as a spit
grows across a bay, joining up
two headlands.
• Lagoon – the area of water
dammed by the bar will
eventually be filled by
deposition.
Now write an explanation of how the barhas formed.

9. Label the following things
onto yourtombolo diagram:
• Direction of Longshore
Drift
• Prevailing wind
• Old Island now joined
to the mainland by a
spit.
• Change in shape of
headland resulting in a
spit.
• Spit grown out from the
mainland and joining an
island, creating a
TOMBOLO.
• Tombolo.
Now write a description to explain
how tombolos are formed.

10. Spit, bar or tombolo?

11. Spit, bar or tombolo?

12. Spit, bar or tombolo?

13. Spit, bar or tombolo?

14. Spit, bar or tombolo?

15. Spit, bar or tombolo?

16. Spit, bar or tombolo?

17. Spit, bar or tombolo?

18. Spit, bar or tombolo?

19. Spit, bar or tombolo?

20. Spit, bar or tombolo?

21. Spit, bar or tombolo?

22. Spit, bar or tombolo?

23. Spit, bar or tombolo?

24. Spit, bar or tombolo?