How are different coastlines produced by physical processes?

http://www.thegeographer.co.uk/uploads/GCSE%202009%20Scheme%20of%20Work.pdf

Homework due next lesson.

What might happen at Stair Hole in the next 100 years?

Use annotated diagrams to describe and explain how Stair Hole might change over the next 100 years.

Large illustration

Different coastlines are created by different physical processes acting on different types and alignment of rocks.

In this lesson you will study two different coastlines in Dorset.

The lesson will begin to prepare for the visit to Swanage where you will collect data for your controlled assessment.

Coming up

What are the different types of rock?How do different rock types affect the coastline? Which landforms are found on coastlines with hard and soft rock?

Types of rock.There are two categories of rock:

Hard rock Soft rock

One of these rocks is very resistant. The other is less resistant.

Can you suggest which is which? What does the resistance of rock affect?

Task: write a definition of hard rock and soft rock.

Types of rock. There are two categories of rock. Match the features with the rock type.

Hard rock

Soft rock

A very resistant rock

Has little resistance

Erodes easily Difficult to erode

The Dorset Coast.The map below shows the Dorset Coast. This is the location of your Controlled Assessment. Some of the coast is a “concordant” coastline, whilst the other part is a “discordant” coastline. Can you work out the type of coastline at point A and point B? Pages 74-75 will help.

A B

The Dorset Coast.The map below shows the Dorset Coast. This is the location of your Controlled Assessment. Some of the coast is a “concordant” coastline, whilst the other part is a “discordant” coastline.

A B

The Dorset Coast.A “concordant” coastline is where the rocks are parallel to the coast. A “discordant” coastline is where the rocks are at right angles to the coast.Can you work out the type of coastline at point A and point B? Pages 74-75 might help.

A B

Task 1. Sketch the Dorset coastline below.2. Label the type of coastline at point A and point B.3. Write a definition of “concordant coastline”.4. Write a definition of “discordant coastline”.

A B

Which landforms do we find on a discordant coastline?

Headlands and bays Headland

Bay

Task

• Create annotated diagrams to demonstrate how bays and headlands are formed. Your annotation should include reference to hard and soft rocks.

Swanage Bay. Can you predict what will happen when “play” is pressed? Explain your predictions.

An example of headlands and bays on the Dorset coastline.

Task

• Create annotated diagrams to demonstrate how bays and headlands are formed. Your annotation should include reference to hard and soft rocks.

Task

Create annotated diagrams to demonstrate how bays and headlands are formed. The sentence starters below might help you:• Clay is a ________ so it erodes ______.• Chalk and limestone are ____, meaning____.• The sea ____ the clay ______ creating a ____.• Erosion of the ________ is slower so a ______ is formed.

Task

•Clay is a soft rock so it erodes• Chalk and limestone are hard rocks • The sea erodes the clay• Erosion of the chalk and limetone.

Create annotated diagrams to demonstrate how bays and headlands are formed. The sentence starters below might help you:

quickly creating a bay.

so it erodes quickly.

is slower so a headland is created.

which erode slowly.

Caves, arches, stacks and stumps

Task

• Create annotated diagrams to demonstrate how Caves, arches, stacks and stumps are formed.

How are caves, arches, stacks and stumps formed?

Can you predict what will happen when “play” is pressed? Explain your predictions.

Caves, arches, stacks and stumps

Task

• Create annotated diagrams to demonstrate how Caves, arches, stacks and stumps are formed.

Create annotated diagrams to demonstrate how Caves, arches, stacks and stumps are formed. These labels may help.

Which landforms do we find on a concordant coastline?

Lulworth Cove

How was Lulworth Cove created?

Annotate your copy of the diagram to describe and explain how Lulworth Cove was formed. Your answer should make explicit reference to chalk, limestone and clay.

How was Lulworth Cove created?

Use the labels below to describe and explain how Lulworth Cove was formed.• The sea has eroded part of the hard limestone.• The clay is quite soft, so has little resistance. This means alot of it has

eroded.• The chalk has more resistance because it is a hard rock. This means less

of it has eroded.

FinallyThe Twelve Apostles are located in Australia.Which landforms can you see here?How were they created?How are they likely to change in the future?Which rock type is visible?Which type of coastline is it?