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This question can be answered by looking at the Mid Ocean Ridge. Being a mostly divergent boundary, the oceanic plates are pulling away due to tensional stress. One would assume this would leave a deep ocean trench as the plates pull away. This is not the case. As the plates pull away, igneous material (usually basalt) is produced upwards and immediately fills the void left by the separating plates. This new magma is at the very center of the Mid Ocean Ridge. The older magma that had been produced in this same method are on either side of this new material. As the plates pull apart, the old material is pulled with it. Gravity also pulls these older materials downward and away from the higher Mid Ocean Ridge.
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When new crust is made what happens to the old crust?
When new crust is made, like at a spreading center, old crust must be destroyed, like at a subduction zone, where it is brought back into the inner earth and melted and recycled through.
Is crust neither created nor destroyed along a transform boundry?
No new crust is created and no old crust is destroyed. The only thing that happens from the transform boundary is that when the rub against each other that create earthquakes.
In sea-floor spreading what happens to the old oceanic crust as new molten material rises from the mantle?
It gets pushed out to either side of the mid-ocean ridge.
How does the movement of the old and the new crust move in seafloor spreading?
well when the sea moves so does the crust.
Since new crust is constantly being added why does earth's surface not keep expanding?
Crust is made from recycling old crust so that there is still the same amount. The earth doesn't expand because there is a cycle that keeps the proportions the same throughout the entire cycle.
When new crust is made what happens to the old crust?
When new crust is made, like at a spreading center, old crust must be destroyed, like at a subduction zone, where it is brought back into the inner earth and melted and recycled through.
Is the crust new or old in the mid Atlantic ridge?
The crust is new.
What happens to old oceanic crust as new molten material from the mantle?
The older oceanic crust moves away from the spreading center and is eventualy subducted back into the mantle.
What happens to old oceanic crust as new molten material rises to the mantle?
The older oceanic crust moves away from the spreading center and is eventualy subducted back into the mantle.
What happens to the old oceanic crust as new molten material rises from the mantle?
The older oceanic crust moves away from the spreading center and is eventualy subducted back into the mantle.
Is crust neither created nor destroyed along a transform boundry?
No new crust is created and no old crust is destroyed. The only thing that happens from the transform boundary is that when the rub against each other that create earthquakes.
Why doesnt the earth get bigger when the new crust is made?
Because the old one is destroyed. So it doesn't expand.
Which is denser old oceanic crust or new oceanic crust?
how is this food and cooking? it is geography
Why is old oceanic crust denser than new oceanic crust?
cause its cooler
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 does the movement of the old and the new crust move in seafloor spreading?
well when the sea moves so does the crust.
In sea-floor spreading what happens to the old oceanic crust as new molten material rises from the mantle?
It gets pushed out to either side of the mid-ocean ridge.
