Table of Contents
- 1 What do you think eventually happens to the oceanic crust once it starts sinking in the asthenosphere?
- 2 What happens when an oceanic crust is pushed?
- 3 What happens when tectonic plates move past each other?
- 4 What happens to oceanic plate A as it collides with plate B Why?
- 5 How are the plates of the Earth’s crust broken up?
- 6 How does oceanic crust return to the mantle?
What do you think eventually happens to the oceanic crust once it starts sinking in the asthenosphere?
Scientists hypothesize that after being subducted, some oceanic crust sinks all the way to the bottom of the mantle. Eventually, nearly all oceanic crust is recycled in this process (a very small amount of oceanic crust is preserved on the continents – these deposits are called ophiolites).
What happens when an oceanic crust is pushed?
When two oceanic plates converge, the older, denser plate will subduct into the mantle. An ocean trench marks the location where the plate is pushed down into the mantle. (a) Subduction of an ocean plate beneath an ocean plate results in a volcanic island arc, an ocean trench and many earthquakes.
What do you think would happen to the crust when two tectonic plates collide with each other?
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 do you think may happen to oceanic plate as it continues to move downward?
As it continues to move downwards, it will undergo subduction process. It will melt because of the very hot or high temperature of the mantle which is the layer below the crust.
What happens when tectonic plates move past each other?
When oceanic or continental plates slide past each other in opposite directions, or move in the same direction but at different speeds, a transform fault boundary is formed. No new crust is created or subducted, and no volcanoes form, but earthquakes occur along the fault.
What happens to oceanic plate A as it collides with plate B Why?
The volcanic arc is formed to “plate A” as it collides with “plate B”. The collision of these two plates results in the oceanic current which is generated. The earthquake is produced because of the volcanic arc creation between the plate A and the plate B.
What happens when oceanic crust collides with continental crust?
What happens when oceanic crust collides with continental crust at a plate boundary? When continental and oceanic plates collide, the thinner and more dense oceanic plate is overridden by the thicker and less dense continental plate. The oceanic plate is forced down into the mantle in a process known as “subduction.”
What happens when tectonic plates crash on the seafloor?
Subduction happens where tectonic plates crash into each other instead of spreading apart. At subduction zones, the edge of the denser plate subduct s, or slides, beneath the less-dense one. The denser lithospheric material then melts back into the Earth’s mantle. Seafloor spreading creates new crust.
How are the plates of the Earth’s crust broken up?
The Earth’s crust is broken up into a series of massive sections called plates. These tectonic plates rest upon the convecting mantle, which causes them to move. The movements of these plates can account for noticeable geologic events such as earthquakes, volcanic eruptions, and more subtle yet sublime events, like the building of mountains.
How does oceanic crust return to the mantle?
Oceanic crust is created, but it is destined soon to return to the mantle at subduction zones, to make space for newer crust. Squeezing out of the water the crust gained from the oceans helps create new continental crust.