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Subduction occurs where the oceanic crust bends down toward the mantle at a(n)?
Wiki User
∙ 7y ago
Seafloor spreading occurs along mid-ocean ridges. Mid-ocean ridges are large mountain ranges on the ocean floor. The shifting in the rock causes the seafloor to spread and allows magma to bubble and form more mountains on the ocean floor.
Wiki User
∙ 9y ago
Wiki User
∙ 14y agothe mid-ocean ridges
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What forces drive the process in subduction zones dense pieces of oceanic crust are pulled downward toward the mantle?
gravity
In the prosess of sea-floor spreading. what happens when magma rises to earth's surface and solidifies?
It creates new seafloor and moves the oceanic plate like a conveyer belt toward a subduction zone where it re-enters the mantle.
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.
Where does the lava emitted during volcanic eruption come from?
Magma originates either from rising plumes of heat at hot spots in the Earth's mantle, where decompression melting takes place as the hot rock nears the surface; or, it originates in the mantle from subduction of oceanic crust, where cold, wet rock speeds melting of the subducting rock and it rises toward the surface.Read more: Where_does_magma_and_lava_come_from
What is the process whereby the weight of an uplift ocean ridge pushes an oceanic plate toward a subduction zone?
you don't have to know those things. It's not for your age. hahahahhahahahahaha
What is the name of the process where ocean crust sinks back toward the mantle?
It is called subduction and only occurs in oceanic to oceanic or oceanic to continental plate collisions.
SUbduction occurs where the oceanic crust bends down toward the mantle at a(an)?
deep ocean trench.
Where oceanic crust sinks toward the mantle beneath continental crust a deep ocean?
A deep ocean subduction trench
What forces drive the process in subduction zones dense pieces of oceanic crust are pulled downward toward the mantle?
gravity
Why does subduction occur at some tectonic plate boundaries?
Subduction occurs at convergent plate margins where plates are moving toward each other. Subduction occurs as old oceanic crust becomes thicker and more dense than the upper mantle directly below it. Because it is more dense, it is forced under younger, less dense oceanic crust, or under continental crust, which is always less dense. At these borders of collision, the older and more dense oceanic crust is drawn by gravity downward, into the mantle, where it is slowly melted. The two basic forces responsible are gravity and heat.
What is a subduction zon as it relates to earth science?
A subduction zone is a place at the margin of a continent where the neighbouring oceanic plate is 'subducted'. That is, the oceanic plate, moving toward the continental plate, goes down into the mantle because it is heavier than the continental plate. Subduction zones typically cause deep ocean trenches.
A deep valley along the ocen floor beneath which oceanic crust slowly sinks toward mantle?
This is known as a trench in a subduction zone.
In the process ofsea-floor spreading what happens when magma rises to earth's surface andsolidifies?
It creates new seafloor and moves the oceanic plate like a conveyer belt toward a subduction zone where it re-enters the mantle.
In the prosess of sea-floor spreading. what happens when magma rises to earth's surface and solidifies?
It creates new seafloor and moves the oceanic plate like a conveyer belt toward a subduction zone where it re-enters the mantle.
What are three major islands arcs?
Island arcs are also called oceanic arcs. Many volcanoes form near converging plate boundaries where subduction occurs. Subduction causes slabs of oceanic crust to sink beneath a deep-ocean trench into the mantle. The crust melts and forms magma, which then rises back toward the surface. Volcanoes form when the magma erupts as lava. At the boundary where two oceanic plates collide, volcanoes can create a string of islands called an island arc. There are many island arcs. The main ones that we read of most often include Japan, New Zealand, Indonesia, Caribbean Islands, Philippines, and the Aleutians.
What are oceanic-oceanic and oceanic-continental subduction boundaries?
In the scope of lithospheric plate movements, both boundaries are areas where the more dense of the colliding plates slides under the lighter one, and moves toward the mantle. The melting of the subducted crust as it nears the mantle may cause volcanism either on the sea floor or on the continental land mass. Earthquakes will also result as the subducting rocks break and grind their way past the non-subducting plate rock.
A long narrow and very deep canyon where the ocean floor bends down toward the mantle is called?
subduction
