Transcript How are different coastlines produced by physical processes?

How are different coastlines
produced by physical processes?
http://www.thegeographer.co.uk/upl
oads/GCSE%202009%20Scheme%20
of%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.
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.
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.
Task
1.
2.
3.
4.
Sketch the Dorset coastline below.
Label the type of coastline at point A and point B.
Write a definition of “concordant coastline”.
Write a definition of “discordant coastline”.
Which landforms do we find on a
discordant coastline?
Headlands and bays
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
Create annotated diagrams to demonstrate how bays and
headlands are formed. The sentence starters below might help
you:
•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.
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.
Finally
The 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?