0
What else can I help you with?
Earth does not get bigger as new oceanic crust forms?
Just as new oceanic crust forms at mid-ocean ridges, old oceanic crust is destroyed at subduction zones.
How old crust is recycled using the theory of plate tectonics?
Subduction
Where does the old oceanic crust go?
Old oceanic crust is primarily recycled back into the Earth's mantle at subduction zones, where one tectonic plate is forced beneath another. This process leads to the destruction of the oceanic crust, as it melts and contributes to mantle convection. Additionally, some old crust may be uplifted and exposed through tectonic processes, such as orogeny, but the majority is eventually subducted and assimilated into the mantle.
What types of boundaries do subduction zones form?
This forms on the plate tectonic boundaries.... particularly the convergent plate boundries.
How are subduction boundaries related to mid-ocean ridges?
The ocean ridges push the old crust into a convergent boundary where it goes into a mantle convection current. The crust then melts in the convection current and is pushed out of the ocean ridge to restart the process again.
How old is crust in subduction zones?
It's generally over 9000
Earth does not get bigger as new oceanic crust forms?
Just as new oceanic crust forms at mid-ocean ridges, old oceanic crust is destroyed at subduction zones.
Why doesn't our planet get larger from sea floor spreading?
As new oceanic crust forms at mid-ocean ridges, old oceanic crust is destroyed at subduction zones.
Where is old crust pushed down into a trench?
subdution zone
What allows earth's crust to move?
The active earth's core continually recycles itself through subduction zones located around certain parts of the planet. The subduction zones are where one tectonic plate is being forced under another, thereby recycling the old crust. New crust is made at rift zones where magma is forced to the surface, cools and then becomes part of our visible (or underwater) earth surface.
What occurs when old oceanic crust is forced back into the mantle?
It will get pushed under the crust and then it will enter something called the subduction zone the plate that slides over the old crust will create either a volcano or a mountain and the old crust will turn into a trench or anything of that source. Hope it helped
The maximum age for oceanic crust is?
The maximum age for oceanic crust is around 200 million years old. This is because the process of seafloor spreading results in older crust being recycled back into the mantle at subduction zones.
What kind of plate boundary cost old and heavy crust to sink in to the mantle?
A subduction zone is the plate boundary where old and heavy oceanic crust sinks into the mantle. At subduction zones, oceanic crust is forced beneath another tectonic plate, typically a continental plate, due to differences in density. This process can lead to the formation of deep oceanic trenches and volcanic arcs on the overriding plate.
Why is earth not getting larger even though new lithosphere is constantly being added at the oceanic ridges?
Rock creation is part of The Rock Cycle. Rocks are destroyed by erosion--they provide new material for sedimentary rocks. Rocks are created at rift zones in the crust--they are also plowed into the mantle at subduction zones and melt.
Where is old seafloor destroyed?
Oceanic crust isn't destroyed because it's old; it is, in fact, destroyed due to destructive plate boundaries. This is where a continental plate and an oceanic plate move towards each other. As the oceanic crust is denser, it is pushed under the continental plate. Here it is forced into the mantle of the earth, where it is destroyed due to heat and convection currents.
Why is the oldest rock on planet earth found on continental plates not oceanic plates?
Oceanic crust is constantly being recycled. New oceanic crust is formed at mid ocean ridges while old ocean crust is destroyed at subduction zones. As a result there is little oceanic crust that is older than 200 million years. Continental crust does not get destroyed by subduction, so much of it has been around since the Precambrian time.
How old crust is recycled using the theory of plate tectonics?
Subduction
