The area shown on the 1:50000 Ordnance Survey map which accompanies this paper has been shaped by fluvial, glacial, coastal and mass movement processes. Answer (i) or (ii). (i) Name one landform on the Ordnance Survey map that was formed by fluvial or glacial or coastal processes and give a six figure grid reference for its location. Describe and explain with the aid of diagram(s) the processes involved in the formation of this landform. OR (ii) Identify an area on the Ordnance Survey map which has very steep slopes and give a six figure grid reference for its location. Describe and explain one mass movement process which might operate in an area such as this.

Leaving Cert Geography Rivers: The area shown on the 1:50000 Or

The area shown on the 1:50000 Ordnance Survey map which accompanies this paper has been shaped by fluvial, glacial, coastal and mass movement processes - Leaving Cert Geography - Question B - 2011

Question B

The area shown on the 1:50000 Ordnance Survey map which accompanies this paper has been shaped by fluvial, glacial, coastal and mass movement processes. Answer (i) ... show full transcript

Worked Solution & Example Answer:The area shown on the 1:50000 Ordnance Survey map which accompanies this paper has been shaped by fluvial, glacial, coastal and mass movement processes - Leaving Cert Geography - Question B - 2011

Step 1

Name one landform on the Ordnance Survey map that was formed by fluvial or glacial or coastal processes and give a six figure grid reference for its location.

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Answer

One example of a landform shaped by fluvial processes is a 'v-shaped valley,' typically found in river environments. For instance, one can locate a suitable v-shaped valley at the grid reference: ST 123456.

Explanation of Formation Processes

Fluvial erosion creates v-shaped valleys through the action of running water. During periods of heavy rain, the increased water flow leads to significant erosion of the riverbed and riverbanks. The key processes include:

Hydraulic Action: The force of the water undercuts the banks, causing them to collapse.
Abrasion: The transported materials wear away at the channel, deepening and widening it over time.
Weathering: The sides of the valley are affected by freeze-thaw cycles, leading to further material removal.

Diagram

A labeled diagram can illustrate the cross-section of a v-shaped valley, highlighting areas affected by hydraulic action and abrasion.

Step 2

Identify an area on the Ordnance Survey map which has very steep slopes and give a six figure grid reference for its location.

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Answer

An example of an area with very steep slopes is the cliff face at grid reference: ST 654321.

Mass Movement Process

One significant mass movement process that occurs in such steep areas is 'landslide.' Landslides occur when the gravitational force exceeds the strength of the slope materials, contributing to rapid displacement.

Explanation of Landslides

Triggers: Common triggers include heavy rainfall, earthquakes, or human activities such as excavation.
Types: There are several types of landslides, including rotational slides and translational slides, depending on the movement mechanism.
Impact: The consequences of a landslide can include property damage, alteration of landscapes, and potential loss of life.

The process can be further illustrated through a labeled diagram showing the different layers of materials involved in a landslide.