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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, which typically forms in a river landscape due to the process of vertical erosion. As a river flows through the landscape, it cuts down into the soil and rock, deepening the channel.
This erosion is enhanced during heavy rainfalls when the volume and speed of the water increase, allowing for greater sediment transport and downcutting. Over time, the river meanders through the valley, shaping steep, concave valley walls that contribute to the characteristic V-formation.
When studying a specific area, it is vital to draw a labelled diagram showing the formation of a V-shaped valley to illustrate this process.
Step 2
Explain the formation of one landform of deposition
Answer
A common landform of deposition is a delta. Deltas form when a river carries sediments and deposits them at its mouth where it meets a body of water such as a sea or lake. As the river slows down upon entering the larger body of water, its capacity to transport sediments diminishes, causing the sediments to settle.
Over time, these deposits build up, creating a triangular or fan-shaped area. Deltas can be further classified based on their morphology, and it is beneficial to include a labelled diagram to depict how deltas are formed and the processes involved.
Step 3
Describe and explain two processes of mass movement
Answer
One process of mass movement is soil creep, which is the slow, gradual downslope movement of soil. It occurs due to gravitational pull, often enhanced by freeze-thaw cycles and the expansion and contraction of soil. Over many years, soil creep can lead to noticeable changes in the landscape, such as tilted fences or trees.
The second process is landslides, which are rapid movements of rock and soil down a slope. They can be triggered by heavy rainfall, earthquakes, or human activity that destabilizes the slope. Landslides can have dramatic impacts on the environment, often leading to destruction of habitats and infrastructure.