Glaciation

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Glaciation

• Revision

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Glaciation- need to know

• Physical processes are the product of natural
  processes and are always changing.
• Processes include weathering, mass movement,
  erosion, transportation, deposition.

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What are we looking at?
Glacier
What is happening?
Mountain
Transport
Which processes are taking place?
Broken rock fragments are carried down the valley
Erosion
And remember under the glacier
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Glaciers are not always smooth and white.
Rock fragments being transported on the glacier
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Erosional Features
Arête
When this area was covered in ice, it eroded the
back wall and the bottom of the hollow (where the
lake is)
If two corries form back to back, an arête is
formed. If three form back to back, a pyramidal
peak is formed.
Loch or tarn
When the glacier melts, the hollow fills with
water and forms a loch
Corrie Wall
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How does this look on a map?
Arête
2 corries, back to back
Loch
Valley
Back wall of the corrie
Rivers
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Depositional Features
What are these features called?
Drumlins
Eskers
Moraine
Formed underneath a glacier as the glacier moves
over a large pile of deposits (moraine)
DRUMLINS
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Eskers

• Eskers are formed underneath a glacier
• They form when melt water streams beneath the
  glacier fill up with sediment
• When the glacier melts, the tunnel has left a
  long ridge of sediment, called an ESKER.

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Glaciers also form

• Hanging Valleys
• Terminal Moraine
• U-shaped valleys
• Boulder Clay
• Fiords (sometimes spelt Fjords)