Outline the process of internal deformation - AQA - A-Level Geography - Question 4 - 2018 - Paper 1
Question 4
Outline the process of internal deformation.
This is a process which explains the movement of cold based glaciers. It involves the slow creep of a glacier at just 1... show full transcript
Worked Solution & Example Answer:Outline the process of internal deformation - AQA - A-Level Geography - Question 4 - 2018 - Paper 1
Step 1
This is a process which explains the movement of cold based glaciers.
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Answer
Internal deformation is the movement mechanism of cold-based glaciers, characterized by the slow creep of glacier ice.
Step 2
It explains the slow creep of a glacier at just 1 or 2cm per year.
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Answer
The glacier moves at a slow rate, typically between 1 and 2 centimeters per year.
Step 3
Under great pressure at the base of a glacier, the ice crystals align themselves to the direction of movement of the glacier.
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Answer
High pressure causes the ice crystals at the base to realign, facilitating movement in the glacier's direction.
Step 4
The ice develops plasticity and moves.
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As the ice becomes more plastic, it allows for easier movement, most notably occurring closer to the glacier's bed.
