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Describe and explain destructive plate boundaries. - Leaving Cert Geography - Question B - 2014
Question B
Describe and explain destructive plate boundaries.
Worked Solution & Example Answer:Describe and explain destructive plate boundaries. - Leaving Cert Geography - Question B - 2014
Step 1
Describe destructive plate boundaries
Answer
Destructive plate boundaries, also known as convergent boundaries, occur where two tectonic plates collide. One plate is forced beneath the other in a process called subduction, resulting in the formation of deep oceanic trenches and volcanic arcs. These boundaries are characterized by geological activity, including earthquakes and volcanic eruptions, due to the intense pressure and friction generated during the collision.
Step 2
Explain the geological processes at destructive plate boundaries
Answer
At destructive plate boundaries, as the denser oceanic plate subducts beneath the lighter continental plate, it leads to several geological phenomena. The subducting plate melts in the mantle, causing magma to rise and potentially leading to volcanic activity. This process introduces significant stress, resulting in earthquakes. The uplift of mountain ranges can also occur as a result of the collision of two continental plates, exemplified by the Himalayas formed through the convergence of the Indian and Eurasian plates.