What Is The Process Called When A Lithospheric Plate Descends Into The Mantle?

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What Is The Process Called When A Lithospheric Plate Descends Into The Mantle??

A plate tectonic process in which one lithospheric plate descends beneath another into the asthenosphere during a collision at a convergent plate margin.A plate tectonic process in which one lithospheric plate descends beneath another into the asthenosphere

The asthenosphere is approximately 200 km [124 miles] thick and owing to its depth below the Earth’s surface warm (~ 1 400 degC [2 640 degF]) but not molten. Here the mantle deforms by plastic flow in response to applied pressures above 100 MPa [14 500 psi].
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during a collision at a convergent plate margin.

What is the process when a lithospheric plate descends into the mantle?

Subduction is the tectonic process at convergent margins by which slabs of oceanic lithosphere descend into the mantle.

What is the process called when a lithospheric plate descends into the mantle Continental Drift induction seafloor spreading subduction?

Normal Reversed At trenches a lithospheric plate descends into the mantle where it breaks up and melts. This process called subduction produces earthquakes and volcanoes. The collision that produces a trench can be either between an oceanic plate and a continent or between two oceanic plates.

What is the process called when a lithospheric plate?

What is the process called when a lithospheric plate descends into the mantle? subduction. when an oceanic plate and a continental plate collide what is the resulting feature? trench.

What happens when one tectonic plate descends beneath another?

Where two tectonic plates meet at a subduction zone one bends and slides underneath the other curving down into the mantle. (The mantle is the hotter layer under the crust.) … At a subduction zone the oceanic crust usually sinks into the mantle beneath lighter continental crust.

Which of the following happens when two lithospheric plates collide?

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. … The new magma (molten rock) rises and may erupt violently to form volcanoes often building arcs of islands along the convergent boundary.

What are formed when the lithosphere broken into huge segments?

Tectonic activity describes the interaction of the huge slabs of lithosphere called tectonic plates. … Tectonic activity is responsible for some of Earth’s most dramatic geologic events: earthquakes volcanoes orogeny (mountain-building) and deep ocean trenches can all be formed by tectonic activity in the lithosphere.

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When oceanic lithosphere collides with another plate?

When two oceanic lithospheres collide one runs over the other which causes the latter to sink into the mantle along a zone called a subduction zone. The subducting lithosphere is bent downward to form a very deep depression in the ocean floor called a trench. The deepest ocean in the world is found along trenches.

What was Wegener’s theory of continental drift?

Continental drift was a theory that explained how continents shift position on Earth’s surface. Set forth in 1912 by Alfred Wegener a geophysicist and meteorologist continental drift also explained why look-alike animal and plant fossils and similar rock formations are found on different continents.

What is the theory of plate tectonics?

The theory of plate tectonics states that the Earth’s solid outer crust the lithosphere is separated into plates that move over the asthenosphere the molten upper portion of the mantle. Oceanic and continental plates come together spread apart and interact at boundaries all over the planet.

When a subducted plate melts What does it form?

The water contained in the subducted slab (that was once ocean floor) can lower the melting point of the mantle and allow it to melt and form magma. The magma is liquid and less dense than the surrounding mantle therefore it rises through it and then through the continental plate.

When tectonic plates push with each other is called?

Convergent Boundaries

When two tectonic plates push into one another the boundary where they meet is called a convergent boundary.

What is it called when plates move past each other in a lateral side by side motion?

When two tectonic plates slide past each other the place where they meet is a transform or lateral fault. The San Andreas Fault is one of the best examples of lateral plate motion.

What is the name of the boundary where the lithospheric plate descends beneath an overriding plate?

Subduction zones are where the cold oceanic lithosphere sinks back into the mantle and is recycled. They are found at convergent plate boundaries where the oceanic lithosphere of one plate converges with the less dense lithosphere of another plate.

Which of the following occurs when one lithospheric plate descends beneath another surface?

Earth Science Unit 1 Plate Tectonics Vocabulary Advanced
Subduction zone A long narrow zone where one lithospheric plate descends beneath another.
Transform boundary A boundary in which two plates slide past one another without creating or

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At what zone does one plate descends beneath the edge of an adjacent plate?


When oceanic crust converges with continental crust the denser oceanic plate plunges beneath the continental plate. This process called subduction occurs at the oceanic trenches (figure 6). The entire region is known as a subduction zone.

Which of these is false about lithospheric plates Brainly?

Explanation: Lithospheric plates do not have same thickness everywhere because the plates changes its thickness due to intense heat in the Earth’s core as these plates move from Earth’s crust and upper mantle to a deeper plasticine mantle.

What are the various ways in which lithospheric plates interact with each other as they move around on a Dynamic Earth?

The movement of the plates creates three types of tectonic boundaries: convergent where plates move into one another divergent where plates move apart and transform where plates move sideways in relation to each other. They move at a rate of one to two inches (three to five centimeters) per year.

When two plates come together lithosphere is?

convergent plate boundary

convergent plate boundary: A location where two lithospheric plates come together.

Why is Earth’s lithosphere broken into plates?

Plate Tectonics

The lithosphere is divided into huge slabs called tectonic plates. The heat from the mantle makes the rocks at the bottom of lithosphere slightly soft. This causes the plates to move. The movement of these plates is known as plate tectonics.

What are the three main processes that change the lithosphere?

Lithospheric Processes cause magmatism mantle dynamics and faulting which in turn shape the Earth’s ever-changing surface.

What is the creation and destruction of lithosphere?

At convergent boundaries lithospheric plates move together in collision zones where crust is either destroyed by subduction or uplifted to form mountain chains . … Because Earth’s diameter remains constant there is no net creation or destruction of lithospheric plates.

The collision of two continental plates occurs when a sea becomes narrower until both plates collide. After collision the oceanic lithosphere breaks off and sinks into the mantle. The subduction zone eventually becomes inactive The two continents become welded together as they are compressed together over time.

When two tectonic or lithospheric plates collide the oceanic crust usually subducts beneath the continental crust because of its greater?

When an oceanic plate converges with a continental plate the oceanic crust will always subduct under the continental crust this is because oceanic crust is naturally denser. Convergent boundaries are commonly associated with larger earthquakes and higher volcanic activity.

Which of the following is where two lithospheric plates collide with one plate eventually sliding beneath the other causing a process known as subduction?

A convergent boundary (also known as a destructive boundary) is an area on Earth where two or more lithospheric plates collide. One plate eventually slides beneath the other a process known as subduction.

What supports Wegener’s theory of plate tectonics?

Theory of Plate Tectonics was established by Alfred Wegener. Fossils and Mountain ranges were his evidences. Alfred Wegener created the idea of continental drift and wrote ‘The Origin of Continents and Oceans’ to support his idea. … Fossils are the stongest evidences of plate tectonics.

What is Alfred Wegener theory?

In the early 20th century Wegener published a paper explaining his theory that the continental landmasses were “drifting” across the Earth sometimes plowing through oceans and into each other. He called this movement continental drift.

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When was plate tectonic theory finally accepted in the geoscience field?

By 1966 most scientists in geology accepted the theory of plate tectonics. The root of this was Alfred Wegener’s 1912 publication of his theory of continental drift which was a controversy in the field through the 1950s.

How is mantle convection related to plate tectonics?

Geologists have hypothesized that the movement of tectonic plates is related to convection currents in the earth’s mantle. … Tremendous heat and pressure within the earth cause the hot magma to flow in convection currents. These currents cause the movement of the tectonic plates that make up the earth’s crust.

What is the scientific basis for dividing lithospheric plates?

Answer: The lithosphere is divided into tectonic plates based on research and measurement of the movements of those plates. If a large section of the lithosphere is all moving in the same direction and at the same speed then it is thought to be a techtonic plate.

What is the source of energy that drives the movement of the lithospheric plates?

Lithospheric plates are part of a planetary scale thermal convection system. The energy source for plate tectonics is Earth’s internal heat while the forces moving the plates are the “ridge push” and “slab pull” gravity forces. It was once thought that mantle convection could drive plate motions.

What happens to the subducted plate?

Where two tectonic plates meet at a subduction zone one bends and slides underneath the other curving down into the mantle. (The mantle is the hotter layer under the crust.) … At a subduction zone the oceanic crust usually sinks into the mantle beneath lighter continental crust.

How does the subducting lithosphere melt the mantle?

Melting the mantle by adding fluids

As a result the mantle rocks in the wedge overlying the subducting slab produce partial melts = magmas. As the magmas are lighter than the mantle and start to rise above the subduction zones to produce a linear belt of volcanoes parallel to the oceanic trench.

When a plate is subducted and melted what happens to the melted crustal plate?

Due to the heat caused by it rubbing against the other plate as well as the natural heat of the mantle the plate melts and turns into magma. The area where subduction occurs is known as the subduction zone. When one plate begins to slip underneath another one a trench is formed.


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