Examine, with the aid of a labelled diagram or diagrams, the processes that have led to the formation of one Irish landform of erosion or deposition of your choice. - Leaving Cert Geography - Question i - 2010
Question i
Examine, with the aid of a labelled diagram or diagrams, the processes that have led to the formation of one Irish landform of erosion or deposition of your choice.
Worked Solution & Example Answer:Examine, with the aid of a labelled diagram or diagrams, the processes that have led to the formation of one Irish landform of erosion or deposition of your choice. - Leaving Cert Geography - Question i - 2010
Step 1
Landform identified:
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Answer
The Glendalough valley, a classic example of a U-shaped valley in Ireland, formed by glacial erosion.
Step 2
Named process:
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Answer
Glacial erosion is the primary process that shaped the Glendalough valley.
Step 3
Irish example:
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Answer
Glendalough, located in County Wicklow, displays the distinctive features of a U-shaped valley.
Step 4
Labelled diagram:
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Answer
A diagram illustrating the U-shaped valley of Glendalough, showing features such as the valley walls, floor, and the glacial movement direction.
Step 5
Examination of processes (1):
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Answer
Glacial accumulation occurs when snow compacts into ice with pressure over time. This ice begins to flow under the influence of gravity.
Step 6
Examination of processes (2):
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Answer
As the glacier moves, it erodes the underlying rock through processes such as plucking and abrasion, creating a distinct U-shaped profile.
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Examination of processes (3):
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Plucking occurs when meltwater seeps into cracks in the rock and freezes, pulling chunks of rock away as the glacier moves.
Step 8
Examination of processes (4):
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Abrasion is the result of the glacier dragging debris across the bedrock, smoothing and deepening the valley.
Step 9
Examination of processes (5):
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The retreat of the glacier leaves behind a U-shaped valley, with features such as hanging valleys and moraines indicative of glacial action.
Step 10
Examination of processes (6):
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Answer
The post-glacial period can also lead to sediment deposits as meltwater flows away, further altering the valley structure.
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