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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.
What else can I help you with?
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.
In sea-floor spreading what happens to the old oceanic crust as new molten material rises from the mantle?
In sea-floor spreading, the old oceanic crust is pushed away from the mid-ocean ridge as new molten material rises from the mantle. As the new material solidifies, it forms new oceanic crust, leading to the spreading of the seafloor and the continuous creation of new crust. The older oceanic crust eventually gets subducted back into the mantle at tectonic plate boundaries.
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.
What plate boundaries are where the crust forms?
Mid-ocean ridges are divergent plate boundaries where new oceanic crust forms as tectonic plates move apart. At these boundaries, magma rises from the mantle, cooling and solidifying to create new crust.
Is crust being destroyed or created?
near ocean trenches.
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.
Why doesnt the earth get bigger when the new crust is made?
Because the old one is destroyed. So it doesn't expand.
In sea-floor spreading what happens to the old oceanic crust as new molten material rises from the mantle?
In sea-floor spreading, the old oceanic crust is pushed away from the mid-ocean ridge as new molten material rises from the mantle. As the new material solidifies, it forms new oceanic crust, leading to the spreading of the seafloor and the continuous creation of new crust. The older oceanic crust eventually gets subducted back into the mantle at tectonic plate boundaries.
Why is old oceanic crust denser than new oceanic crust?
cause its cooler
Which is denser old oceanic crust or new oceanic crust?
how is this food and cooking? it is geography
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.
What is the difference between contiental crust and oceanic crust?
Continental crust is thicker, less dense, and composed mainly of granite, while oceanic crust is thinner, more dense, and primarily made of basalt. Continental crust is older and can be up to 3 billion years old, while oceanic crust is typically less than 200 million years old.
What happens to old oceanic crust as molten materials rises from the mantle?
The older oceanic crust moves away from the spreading center and is eventualy subducted back into the mantle.
