1. Exam Q: Have a go….
“Describe and explain the difference between
constructive and destructive waves, and how
they affect the coastline.” [4marks]

2. How does geology influence
erosion?

3. For the exam
• You will have to be able to identify and explain
different landforms
• They are split in to 2 groups:
Erosional landforms (created by erosion), e.g.
headlands, cliffs, caves, etc.
Depositional landforms (created by deposition),
e.g. beaches, spits, etc.

4. Make a prediction
• Sketch what you think will happen to this
coastline + how it might look in 30’000 years

5. The geology of the coast
affects how much it is
eroded.
More resistant rocks
(e.g. chalk) erode more
slowly than less
resistant rocks (e.g.
clay, limestone)
This gives us BAYS
And HEADLANDS

6. Case Study : Jurassic Coast,
Dorset
Prep for field trip next week

7. The Jurassic
Coast
• The Jurassic Coast is a section of coastline in
Southern England that shows geology over
millions of years.
• The coastline first began forming 250million
years ago
• Dorset shows the geology of the Jurassic
period, between 200-140million years ago

8. Bays + Headlands at Swanage

9. Jurassic Coast
• Using the maps above + the laminated sheet,
describe the location of Lulworth Cove. Use
evidence from the map. [3marks]
N

10. Lulworth
cove
• Lulworth Cove, Dorset, has a geology which is a mix of different rocks which
have been tilted upwards over the years to become nearly vertical.
• Millions of years ago, a river rain through the rocks to the sea. This allowed
sea water to enter + erode the rocks inland. First an opening in the
limestone was eroded, then the sea reached the softer rocks of clay and
sands and very quick erosion happened, spreading outwards.
• Eventually, the sea eroded far back in to the land until it reached the
resistant chalk. Here the erosion slowed down. This made the perfect
horseshoe-shaped bay you can see.
• Eventually this cove will erode further back and join another cove, to form
one massive bay.

11. Lulworth Cove
Stair
Hole, left.
Lulworth
Cove,
Dorset
right and
below
Lulworth Cove is a horseshoe
shaped bay that formed because
the inland rocks are less
resistant than the headland.
It is obvious how different rock
types are affected at different
rates.

12. The Durdle Door arch
•One of the features of the
Jurassic coast is the Durdle
Door arch.
•Why do you think it looks like
this?

13. How does geology influence
erosion?

14. O.S. Map of Ballard point, a headland
on the Jurassic Coast.
What type of rock do you think the
headland might be made from? …...
………..............................................
What effect does this have?.............
…………………………………………
What type of rock do you think the
headland might be made from? …...
………..............................................
What effect does this have?.............
…………………………………………
What type of rock do you think the
bay might be made from?
…………. ..........................................
...............
What effect does this have?.............
…………………………………………

16. Geological map of Ballard point
The headland:
Made of chalk
(light green)
Resistant rock
The beach:
Made of gault
clay (dark green)
and silt (blue)
The bay:
Made of soft clays
(red + dark green)
and sand (pink)

17. Overlay map
Using the printed map, make an overlay map of the
geology on tracing paper
1)On the printed O.S. Map, label the Headland,
beach and Bay
2)On the tracing paper, shade the dark green, light
green, red, pink and blue outlines to show the
different geology
3)Label the light green outline chalk, red and dark
green is clay, pink is sand, blue is silt
4)Stick the tracing paper over the O.S. Map as an
overlay. Give it a title.

18. Geog.GCSE
• Page 27
• Make a neat annotated sketch of Diagram C
• Annotations should have ...................?

19. Old Harry Rocks and Ballard Down.
What landform is
this?
What landform is
this?

20. Old Harry Rocks
What landform is
this?
What process
might have
happened here?

21. Durdle Door Arch in Dorset
What landform is
this?
What landform is
this?

22. The Needles, Isle of Wight
What landforms
are these?

23. Birchington-on-Sea
What landform is
this?

24. Wave cut platform, Southerndown,
Wales

25. ICT taskICT task
• Using the internet, produce a powerpoint that answers these questions:
1) Where is the Jurassic Coast? (Include map and description)
2) What erosion processes are happening at Lulworth Cove? (name the
processes)
3) What landforms can be found in the Jurassic Coast? (Include pictures and
labels, e.g. Arches, caves, etc.) – TIP. Look at Lulworth Cove, Durdle Door,
Swanage, Old Harry Rocks.
4) Why are some areas eroding more quickly than others? (Think of the
geology)
5) How do people use the area?
When you have completed the task:
- Upload your project to www.slideshare.net.
- Log in to ‘My Slidespace’ with username geodebs, password geodebs
- Save your work on here for me to mark.

26. Homework
• Extended homework sheet
• This does not mean leave it to the last minute
• Each week I want an update on what you have
found out so far.
• This should be a long project
• Due: