Drumlins

Created by: carlysmith7
Created on: 12-05-21 16:32

How are drumlins formed?

Streamlined movement of glacial ice sheets across rock debris or till

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What are drumlins?

Drumlins are oval-shaped hills, largely composed of glacial drift, formed beneath a glacier or ice sheet and aligned in the direction of ice flow.

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How is a corrie formed? 1

1. Snow collects in a hallow, usually in North-Facing sloped in the northern hemisphere.
2. Every winter, there is more snow collected, becoming compact and the air is squeezed out leaving ice.
3. back wall gets steeper because of freeze-thaw and plucking

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How is a corrie formed? 2

As the glacier gets heavier it moves downhill. The glacier moves out of the hollow in a circular motion called rotational slip.
Due to less erosion at the front of the glacier a corrie lip is formed.
After the glacier has melted a lake forms in the hollow

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What are features in a corrie?

arêtes - this is a narrow ridge of land that is created when two corries erode back towards each other
pyramidal peak - if three or more corries erode back towards each other, at the top of a mountain a pointed peak is left behind

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How are U-Shaped Valley's formed?

U-shaped valleys are formed from V-shaped valley. They are formed by a glacier that moves down the valley by gravity. As the glacier moves down the valley it plucks the rock from beneath and those rocks rub against the bed of the valley eroding it further

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Other cards in this set

Card 2

Front

What are drumlins?

Back

Drumlins are oval-shaped hills, largely composed of glacial drift, formed beneath a glacier or ice sheet and aligned in the direction of ice flow.

Card 3

Front

How is a corrie formed? 1

Back

Card 4

Front

How is a corrie formed? 2

Back

Card 5

Front

What are features in a corrie?

Back

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Drumlins