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Glaciated Landscapes Corrie Deep rounded hollows with a steep back wall. After the ice has melted a lake will be formed behind the rock lip , the lake is called a tarn Examples Mt Snowdon – N Wales Helvellyn – Red Tarn – Lake District

Glaciated Landscapes Corrie Deep rounded hollows with a steep back wall. After the ice has melted a lake will be formed behind the rock lip, the lake is

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Page 1: Glaciated Landscapes Corrie Deep rounded hollows with a steep back wall. After the ice has melted a lake will be formed behind the rock lip, the lake is

Glaciated Landscapes

Corrie

Deep rounded hollows with a steep back wall. After the ice has melted a lake will be formed behind the rock lip, the lake is called a tarn

Examples

Mt Snowdon – N Wales

Helvellyn – Red Tarn – Lake District

Page 2: Glaciated Landscapes Corrie Deep rounded hollows with a steep back wall. After the ice has melted a lake will be formed behind the rock lip, the lake is

Steep back wall

Tarn Rock lip

Page 3: Glaciated Landscapes Corrie Deep rounded hollows with a steep back wall. After the ice has melted a lake will be formed behind the rock lip, the lake is

• During ice age smaller tributary glaciers joined with larger ones in the main valley.

• Glaciers in the main valley eroded more deeply

• When ice melts smaller valleys left at a higher level.

• Tributary streams descend to the main valley via a waterfall.

Page 4: Glaciated Landscapes Corrie Deep rounded hollows with a steep back wall. After the ice has melted a lake will be formed behind the rock lip, the lake is
Page 5: Glaciated Landscapes Corrie Deep rounded hollows with a steep back wall. After the ice has melted a lake will be formed behind the rock lip, the lake is
Page 6: Glaciated Landscapes Corrie Deep rounded hollows with a steep back wall. After the ice has melted a lake will be formed behind the rock lip, the lake is

Corries either side

When 3 or more corries cut into a mountain a pyramidal peak or horn develops. Arêtes separate the corries.

Page 7: Glaciated Landscapes Corrie Deep rounded hollows with a steep back wall. After the ice has melted a lake will be formed behind the rock lip, the lake is
Page 8: Glaciated Landscapes Corrie Deep rounded hollows with a steep back wall. After the ice has melted a lake will be formed behind the rock lip, the lake is

V shaped river valley – narrow floor, steep sided and winding

U shaped, straight, wide flat floor with truncated spurs

Page 9: Glaciated Landscapes Corrie Deep rounded hollows with a steep back wall. After the ice has melted a lake will be formed behind the rock lip, the lake is

How do they form ?

• Glacier moves down an existing river valley

• Through abrasion and plucking it widens, deepens and straightens the valley

• It removes the ends of interlocking spurs forming cliff like truncated spurs

• The V shaped valley turns into a U shape

Page 10: Glaciated Landscapes Corrie Deep rounded hollows with a steep back wall. After the ice has melted a lake will be formed behind the rock lip, the lake is

When 2 or more corries are side by side / back to back.

They erode towards each other so that the land between them gets narrower and narrower until a knife edge ridge forms, called an Arête.

Back wall of corrie either side

Page 11: Glaciated Landscapes Corrie Deep rounded hollows with a steep back wall. After the ice has melted a lake will be formed behind the rock lip, the lake is
Page 12: Glaciated Landscapes Corrie Deep rounded hollows with a steep back wall. After the ice has melted a lake will be formed behind the rock lip, the lake is

A lake in the bottom of a glacial trough formed by lots of plucking or deposition of moraine. There are many examples in the lake District such as Windermere, Buttermere or Coniston water.

Long narrow lake, water may be dammed up behind terminal moraine

Bottom of lake could be softer rock

Can form when tributary glacier joins to add to the amount of erosion

Page 13: Glaciated Landscapes Corrie Deep rounded hollows with a steep back wall. After the ice has melted a lake will be formed behind the rock lip, the lake is
Page 14: Glaciated Landscapes Corrie Deep rounded hollows with a steep back wall. After the ice has melted a lake will be formed behind the rock lip, the lake is
Page 15: Glaciated Landscapes Corrie Deep rounded hollows with a steep back wall. After the ice has melted a lake will be formed behind the rock lip, the lake is
Page 16: Glaciated Landscapes Corrie Deep rounded hollows with a steep back wall. After the ice has melted a lake will be formed behind the rock lip, the lake is
Page 17: Glaciated Landscapes Corrie Deep rounded hollows with a steep back wall. After the ice has melted a lake will be formed behind the rock lip, the lake is
Page 18: Glaciated Landscapes Corrie Deep rounded hollows with a steep back wall. After the ice has melted a lake will be formed behind the rock lip, the lake is