EARTH SCIENCE
TECTONICS
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a piece of continental crust and a piece of oceanic crust meeting at a divergent boundary
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a piece of continental crust and a piece of oceanic crust meeting at a convergent boundary
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two pieces of oceanic crust meeting at a divergent boundary
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two pieces of continental crust meeting at a divergent boundary
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Detailed explanation-1: -A subduction zone is an area where one tectonic plate sinks underneath another one. Volcanoes often form as a result. Which of the following plate collisions would most likely result in a subduction zone? In subduction zones, dense pieces of oceanic crust are pulled downward toward the mantle.
Detailed explanation-2: -A subduction zone is a region in which a portion of a tectonic plate sinks beneath another plate into the Earth’s interior. Subduction zones are defined by deep oceanic trenches, lines of volcanoes parallel to the trenches, and zones of large earthquakes that extend from the trenches landward.
Detailed explanation-3: -If two tectonic plates collide, they form a convergent plate boundary. Usually, one of the converging plates will move beneath the other, a process known as subduction.
Detailed explanation-4: -Subduction zones form where a plate with thinner (less-buoyant) oceanic crust descends beneath a plate with thicker (more-buoyant) continental crust.
Detailed explanation-5: -Thick layers of sediment may accumulate in the trench, and these and the subducting plate rocks contain water that subduction transports to depth, which at higher temperatures and pressures enables melting to occur and ‘magmas’ to form. The hot buoyant magma rises up to the surface, forming chains of volcanoes.