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Examine the diagrams above and answer the following questions - Leaving Cert Geography - Question A - 2013
Question A
Examine the diagrams above and answer the following questions. (i) Name the type of fault at A and the type of fault at B. (ii) Explain briefly what causes the typ... show full transcript
Worked Solution & Example Answer:Examine the diagrams above and answer the following questions - Leaving Cert Geography - Question A - 2013
Step 1
Name the type of fault at A and the type of fault at B.
Answer
The type of fault at A is a Normal Fault and the type of fault at B is a Reverse Fault. Normal faults occur due to extensional forces, causing the hanging wall to move downward relative to the footwall. Reverse faults, conversely, occur due to compressional forces, causing the hanging wall to move upward.
Step 2
Explain briefly what causes the type of faulting at A or at B.
Answer
Normal faults occur primarily due to tension in the Earth's crust, which pulls the rocks apart, allowing the hanging wall to slide down relative to the footwall. Reverse faults are caused by compression, where the Earth's crust is pushed together, forcing the hanging wall up. Both types of faults highlight the dynamic nature of tectonic processes.
Step 3
Name the landform at C and the landform at D that result from faulting.
Answer
The landform at C is a Rift Valley (Graben), which is formed as sections of the Earth's crust drop down between two normal faults. The landform at D is a Block Mountain (Horst), formed when the land between two reverse faults is pushed upward, creating elevated terrain.