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Describe and explain destructive plate boundaries. - Leaving Cert Geography - Question 3C - 2018
Question 3C
Describe and explain destructive plate boundaries.
Worked Solution & Example Answer:Describe and explain destructive plate boundaries. - Leaving Cert Geography - Question 3C - 2018
Step 1
Describe destructive plate boundaries.
Answer
Destructive plate boundaries, also known as convergent boundaries, occur where two tectonic plates move towards each other. At these boundaries, one plate is forced beneath another in a process called subduction. As the oceanic plate subducts, it melts into the mantle, creating a variety of geological phenomena, including earthquakes, volcanic activity, and the formation of mountain ranges.
These boundaries are typically characterized by the presence of deep ocean trenches and volcanic arcs. A prime example of a destructive boundary is the boundary between the Nazca Plate and the South American Plate, which has created the Andes mountain range.
Step 2
Explain the importance of destructive plate boundaries.
Answer
Destructive plate boundaries play a critical role in the Earth's geology. They are significant in the recycling of Earth's crust, as the motion of plates leads to the subduction of crustal material, which is then remelted and reintroduced into the mantle. Additionally, these interactions can lead to significant seismic activity, contributing to our understanding of earthquakes and their mechanics.
Moreover, volcanic eruptions resulting from these boundaries can lead to fertile soils in surrounding areas, which can be beneficial for agriculture. However, they also pose hazards to human populations, necessitating the necessity for monitoring and disaster preparedness in regions located near these boundaries.