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Coasts

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1. Introduction to Coasts
2. British Isles and Processes
3. Features of Erosion
4. Features of Deposition

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1. Introduction to Coasts

Here, we look at an introduction to coasts. Click on the photographs below to view some interesting coastlines from around the world.

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A New Ocean (1:33)
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Ocean Waves Explained (2:01)
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BBC Clip (2:14)
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2. Coastlines and Processes

The British Isles has a coastline which amounts to 19,491 miles! This section looks at the processes of erosion and deposition that take place here. 

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Processes of Erosion at the Coastline

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Hydraulic Action: Waves  crash against a cliff and drive water under great pressure into cracks in the  rock.  This pressure squeezes the air  and as the wave falls back the air expands explosively, loosening pieces of  rock.

2. Corrasion: Corrasion  (or abrasion) occurs when stones and pebbles are picked up by waves and  thrown against the cliff, causing erosion.   
 
3. Attrition: Rock  fragments (stones and pebbles) hit against each other and so are reduced in  size.

4. Solution: Salty  sea water chemically dissolves rocks.   This is most noticeable on chalk and limestone cliffs.



 

3. Coastal Erosion and Deposition

A section on the features which are formed as a result of coastal erosion and deposition. Aspects of OS mapping have also been inlcuded.

1. Coastal Erosion
File Size: 7712 kb
File Type: pptx
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2. Coastal Deposition
File Size: 3627 kb
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3. Coasts on OS Maps
File Size: 2546 kb
File Type: pptx
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Other Maps which are good for coastal features include:
- Swanage
- Lerwick

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Read Pages 90 to 98 and complete associated activities.

Links and Clips

Happisburgh Britain from above (4:50)
Longshore Drift (4:16)
Happisburgh Part 2 (3:30)
Landforms Created (2:00)
BBC Old Harry Formation (4:45)
COASTS bitesize
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