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What happens when an oceanic plate moves under a conitental plates through a subduction?
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Description of oceanic-oceanic subduction?
Occurs when ocean crust sinks under continental crust, it sinks because it's colder and denser,at these sites, deep-ocean trenches also form along with coastal mountains. As the oceanic crust moves, these trenches often causes underwater earthquake, as the crust sinks under a continent, the crust buckles to form a range of mountains, like island arcs, parallel to a deep-ocean trench. Some of the mountains are volcanoes, which form as melted oceaninc crust rises through the top plate. For example: Cascade Mountains in Oregon and Washington.
How is old crust removed in subduction zones?
Old crust is removed in subduction zones through a process known as subduction. When two tectonic plates converge, one plate is forced beneath the other into the Earth's mantle. As the descending plate sinks, it carries the old crust with it. The intense heat and pressure of the mantle eventually cause the old crust to melt and recirculate into the mantle, where it can contribute to the formation of new crust.
What is created by subduction?
In plate tectonics, a subduction zone forms where the boundaries of two plates that are being pushed into each other meet and one is forced down beneath the other one. The "forced down" plate is being subducted. The subduction zone is the area where one plate is shoved down and the other rides up over the top of the first one. Surf the link over to our friends at Wikipedia for some cool pics and more info.
Why did Mount Tambora happen?
Mount Tambora formed as a result of a subduction zone. Here, a section of the ocean floor that is part of the Indo-Australian Plate is sliding under part of the Eurasian Plate and into the mantle. The oceanic crust takes some water and other volatiles with it. This seeps into the superheated rock of the mantle, allowing it to melt. It then rises toward the surface and through the crust via cracks. This then emerges on the surface, forming volcanoes such as Mount Tambora.
Is basalt underground?
Basalt is an igneous rock formed at or near the surface. It can be drawn into the mantle through the movements of plates at subduction zones.
How does a trench forms?
They form when the oceanic crust goes under the Continental crust. The oceanic crust then forms the trenches through a process called subduction.
How does trench formed?
They form when the oceanic crust goes under the Continental crust. The oceanic crust then forms the trenches through a process called subduction.
How does a deep-ocean trench form?
They form when the oceanic crust goes under the Continental crust. The oceanic crust then forms the trenches through a process called subduction.
What happens when continental collides with continental crust?
The oceanic crust is force down into the mantle in a process called subduction. The subducting oceanic plate will introduce water into the hot mantle, causing some of the rock to melt. The molten rock will rise through the overriding continental crust to form volcanoes.
How was the Andes mountain range formed?
The Andes Mountains were formed through subduction of the oceanic plate underneath the South American plate.
What happens at deep ocean trenches?
At some points, the oceanic crust bends downward and forms a deep-ocean trench. Then the oceanic crust sinks back into the mantle through a process called subduction.
What is the difference between a mid oceanic ridge and a subduction zone?
A subduction zone occurs at convergent plate margins where an oceanic plate is going underneath a continental plate or a less dense oceanic plate. A mid-ocean ridge is a divergent plate boundary on the ocean floor with a mountain range and a rift running through the center of it. Sea floor spreading also occurs at mid ocean ridges.
What happens when oceanic crust and continental crust collide?
Subduction occurs on continental boundaries because oceanic sub floor is denser and heavier than the lighter more buoyant crust. The oceanic crust slides under the continental crust areas usually on a plate boundary. This is in a recycle style mode that constantly is remaking the ocean floor. The oldest rocks on the ocean bottom are a drop in the geologic time bucket, compared to the rock ages on land.
Are oceanic rocks billion years old?
No. Oceanic crust is recycled into the mantle through a process called subduction and new ocean floor is formed at mid-ocean ridges. None of the ocean floor is more than about 180 million years old. Some rocks on the continents are billions of years old.
What causes an underwater volcanoes?
Underwater volcanoes have several means of formation: so called 'hot spots' in the Earth's mantle in which case magma oozes through the oceanic crust; plate subduction, where the denser oceanic plate moves under the less dense plate and melts upon contacting the mantle, and volcanism created by diverging oceanic plates.
What happens when plates collide and one plate sinks?
The collision of plates commonly includes "subduction", where one plate is forced under the other, down into the mantle. These plates are melted and rise again, adding to the magma under the overlying plate. This creates heated rock that can later emerge through the surface in volcanoes. Oceanic plates are thinner and denser than continental plates, so are the ones forced down, either under a continental plate or another oceanic plate.
Description of oceanic-oceanic subduction?
Occurs when ocean crust sinks under continental crust, it sinks because it's colder and denser,at these sites, deep-ocean trenches also form along with coastal mountains. As the oceanic crust moves, these trenches often causes underwater earthquake, as the crust sinks under a continent, the crust buckles to form a range of mountains, like island arcs, parallel to a deep-ocean trench. Some of the mountains are volcanoes, which form as melted oceaninc crust rises through the top plate. For example: Cascade Mountains in Oregon and Washington.
