1. Coastal Erosion Features

2. Title Coastal Erosion Features
L.O. To describe and explain the formation of coastal landforms
Key Words
Bay
Headland
Erosion
Stack
Stump
Cave
Arch

3. Starter - Quick Quiz
Erosion is the wearing away and removal of material
The fetch is how fast the wind can blow
Deposition is the breaking down of material
Transportation is how you get home
1.T
2. F
3. F
4. F

4. What do you think will happen here?
This is called a DISCORDANT coastline as the rock types are at right angles to the sea.

7. Draw this sequence of diagrams explaining how headlands and bays form.

9. How does the coastline go from this?
To this?

10. Look carefully at the next 6 images and try to work out the order that they should go in.
Show the order using a flow chart:
For example
Stack Cliff Arch

11. Cave
Stack
Cliff
Arch
Headland
Stump

12. Cliff
Headland
Cave
Arch
Stack
Stump

13. In the beginning there was a cliff and the cliff was eroded by the power of the sea.

14. Over thousands of years the coast erodes away – the coastline is said to be Dynamic and constantly changing shape.
Receding Coastline

15. Caves form first as the cliffs lines of weakness are eroded.

16. Headland Lines of Weakness
The cave eventually breaks through to the other side of the headland.
Lines of
Weakness

17. Further erosion produces an Arch.
Bridge of the Arch

18. Eventually the bridge of the arch collapses and leaves a sea Stack.?
What happened
Here
Eventually the bridge of the arch collapses and leaves a sea Stack.

19. Sea Stack in Iceland - the stack is black as Iceland is made of volcanic rock.

20. The stack’s lines of weakness are further eroded and it eventually collapses.

21. Finally, after thousands of years of erosion a Stump is all that is left of a once mighty coastal headland.

22. Tasks – stick this diagram in your book and label it “Coastal Erosion Features”
Look at the following statements on the next slide and again produce a flow chart to show the correct order for the processes of erosion from a headland to a stump.

23. The cave gets eroded to the other side of the headland and an arch forms.
Over time the waves erode the stack alongside with weathering. This eventually collapses leaving a stump.
The bridge of the arch is further worn away by sub-aerial processes and eventually collapses leaving a sea stack.
The cracks in the cliff grow larger and form a cave.
The sea attacks lines of weakness in the cliffs (via hydraulic action and abrasion) of the headland and the cliff begins to break up.

24. The sea attacks lines of weakness in the cliffs (via hydraulic action and abrasion) of the headland and the cliff begins to break up.
The cracks in the cliff grow larger and form a cave.
The cave gets eroded to the other side of the headland and an arch forms.
The bridge of the arch is further worn away by sub-aerial processes and eventually collapses leaving a sea stack.
Over time the waves erode the stack alongside with weathering. This eventually collapses leaving a stump.

25. The cracks in the cliff grow larger and form a cave.
The cave gets eroded to the other side of the headland and an arch forms.
The sea attacks lines of weakness in the cliffs of the headland and the cliff begins to break up.
The bridge of the arch is further eroded and eventually collapses leaving a sea stack.
Over time the waves erode the stack which eventually collapses leaving a stump.

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