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Explain the formation of one landform of erosion and one landform of deposition that you have studied - Leaving Cert Geography - Question B - 2014
Question B
Explain the formation of one landform of erosion and one landform of deposition that you have studied. Or Describe and explain two processes of mass movement that ... show full transcript
Worked Solution & Example Answer:Explain the formation of one landform of erosion and one landform of deposition that you have studied - Leaving Cert Geography - Question B - 2014
Step 1
Explain the formation of one landform of erosion
Answer
One example of a landform of erosion is a V-shaped valley. This formation occurs predominantly due to the process of river erosion. As a river flows, it cuts into the landscape, primarily through vertical erosion. Over time, the river deepens, and the surrounding rock and soil are eroded away, leading to a narrow and steep-sided valley.
Diagram: A simple diagram illustrating a cross-section of a V-shaped valley, showing the river at the base and steep valley sides, can be included for clarity. Remember to label the diagram appropriately for full marks.
Step 2
Explain the formation of one landform of deposition
Answer
An example of a landform of deposition is a delta. Deltas form at the mouth of rivers where they meet a standing body of water, such as an ocean or lake. As the river slows upon entering the standing water, it loses velocity and the sediment it carries is deposited. Over time, these deposits build up to create a delta, characterized by its triangular shape when viewed from above.
Diagram: Include a labeled diagram showing the river flowing into the ocean with sediment deposition leading to delta formation.
Step 3
Or Describe and explain two processes of mass movement
Answer
One process of mass movement is landslide. A landslide occurs when gravity overcomes the frictional force holding soil and rock in place, leading to a rapid downhill movement of material. Factors such as heavy rainfall or earthquakes can trigger a landslide.
Diagram: A simple diagram showing the slope and material movement can enhance understanding of this process.
The second process is soil creep. This slow, gradual movement of soil down a slope is often imperceptible but can significantly alter the landscape over time. Factors contributing to soil creep include freeze-thaw cycles, wetting and drying, and the influence of vegetation.
Diagram: Include a diagram illustrating the characteristics of soil creep, showing the tilted trees and gradual soil movement.