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Headlands - PowerPoint PPT Presentation

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Headlands. and bays. http://www.flickr.com/photos/anthonythomas/3085961629/. Waves attack the coastline. Harder rock. Softer rock. Harder rock. This area is now more sheltered, this encourages deposition and beaches are formed. Harder rock. Harder rock.

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and bays.


Waves attack the coastline.

Harder rock

Softer rock

Harder rock

This area is now more sheltered, this encourages deposition and beaches are formed.

Harder rock

Harder rock

The softer rock is eroded by the sea- forming a bay.

Softer rock

The more resistant rock is left sticking out into the sea called a headland.

Harder rock

Surrounded by deep water and exposed to the full force of the waves- the headlands are eroded.

Harder rock

Harder rock

The shallower waters in the bay continue to encourage deposition.

Softer rock

Harder rock

Stack formation… the waves- the


This is a chalk the waves- the headland.

Hydraulic action will exploit these weaknesses.

Because chalk is a sedimentary rock, lines of weakness run throughout the headland.

Between the waves- the low and high tide, waves will attack the base of the headland.


The process of corrasion will undercut the base of the cliff, forming a wave cut notch.


The undercutting by the waves- the corrasion will make the cliff unstable.


This creates small caves which are enlarged over time by erosion.


Caves the waves- the develop on either side of the headland.



These caveserode back through the headland and meet, forming an arch.

Continued the waves- the erosion at the base of the arch will cause the roof to become unstable.



It may collapse leaving a stack.

Continued the waves- the erosion of the base of the stack may lead to its collapse, resulting in a stump.



Pop-up headland.. the waves- the


1 the waves- the

You need your template. This will represent a chalk headland.

2 the waves- the

Using a blue crayon- shade the outside horizontal strips- these represent the sea.

3 the waves- the

Using a green crayon- shade the middle horizontal strip- this represents the top of the headland- exposed to weathering.

4 the waves- the

Just above the horizontal blue lines- shade a grey line- make sure it reaches the top of the wave-cut notch. This represents wave action between high and low tide.

5 the waves- the

Don’t cut off your stump!

Carefully cut out all the black areas on the template- with the exception of the wave-cut notch.

6 the waves- the

It should look like this...

7 the waves- the

Using a ruler, carefully fold the horizontal lines.

8 the waves- the

Like this...

9 the waves- the

Glue along the two blue horizontal strips- on the reverse!

10 the waves- the

Position the green strip over the centre of your book. Gently glue down the blue horizontal strip- the one with the stump.- Practice your positioning first.

11 the waves- the

Carefully practice folding the model... are the folds the right way?

12 the waves- the

Finally, glue the final blue strip down. Practice the positioning first...

13 the waves- the

Gently close your book...

14 the waves- the


4 the waves- the






Arty shot...