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How far is the mantle away from the crust of the earth?
The mantle is located directly beneath the Earth's crust and is approximately 1,800 miles (2,900 kilometers) thick. The boundary between the crust and the mantle is known as the Mohorovičić discontinuity or Moho.
Is the upper mantle part of the lithosphere or asthenosphere?
The The crust and the uppermost layer of the mantle form the lithosphere. The asthenosphere, which is still in the upper mantle, is the next layer down.
Where is old crust pushed down into a trench?
subdution zone
Do folded mountains form by plates being pushed down?
Folded mountains form when tectonic plates collide and the crust is compressed and folded due to the immense pressure. The plates are not pushed down, but rather collide, causing the crust to buckle and fold upward to form mountains.
How is heat transfer in the earths mantle related to the movement of the earths crust?
Heat transfer in the Earth's mantle drives the movement of the Earth's crust through the process of convection. As mantle material heats up, it becomes less dense and rises, causing the overlying crust to move. At the same time, cooler mantle material sinks back down, completing the cycle of heat transfer and driving the continuous motion of tectonic plates.
What happens when a plate of oceanic crust collides with a plate of Continetal crust why?
the oceanic crust slides down and burns in the mantle and forms a volcano
What happens to the crust at the top of one of the convection currents in the mantle?
At the top of a convection current in the mantle, the crust can either be pushed upward to form mountains or pulled apart to create rift valleys, depending on the nature of the current. As hot mantle material rises, it can cause the overlying crust to bulge, leading to tectonic activity. Additionally, when the convection current cools and sinks, it may create subduction zones where crust is pulled down into the mantle. This dynamic process contributes to the movement of tectonic plates and is essential in shaping the Earth's surface.
What happens at oceanic-oceanic subduction?
The plate with cooler, denser crust sinks under the other plate, forming a trench. There, the oceanic crust sinks down back into the mantle.
What happens at an oceanic- oceanic subduction?
The plate with cooler, denser crust sinks under the other plate, forming a trench. There, the oceanic crust sinks down back into the mantle.
When rocks are pushed down into the mantle and melt it become?
When rocks are pushed down into the mantle and melt, they become magma. Magma is molten rock located beneath the Earth's surface.
What happens to the oceanic crust that is pushed down at the trench?
When oceanic crust is pushed down at a trench, it undergoes a process called subduction. This involves the denser oceanic plate sinking beneath a lighter continental or another oceanic plate, leading to the formation of deep oceanic trenches. As the crust descends, it can cause geological phenomena such as earthquakes and volcanic activity, as the subducting plate melts and interacts with the mantle. Eventually, the material may contribute to the formation of magma, which can lead to volcanic eruptions above the subduction zone.
Is the crust also the lithosphere?
Not exactly. The lithosphere is the crust and the top of the mantle (down to the asthenosphere).
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.
Ocean plates are pushed down into the upper mantle in what?
Subduction Zones.
What are the oceanic plates pushed down in the upper mantle in?
Subduction Zones.
What are oceanic plates pushed down in the upper mantle in?
Subduction Zones.
How far down does earths mantle go?
The Earth's mantle extends from the base of the crust down to a depth of about 2,900 kilometers (1,800 miles) at the boundary with the outer core. This region is divided into the upper mantle and lower mantle based on differences in composition and behavior.
