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What are places where oceanic crust sinks back into the mantle called?
A "subduction zone".
What is the process by which oceanic crust sinks beneath the trenches?
Oceanic crust sinks beneath trenches through a process known as subduction. As oceanic plates collide with continental plates, the denser oceanic plate is forced downward into the mantle due to gravitational pull. This creates a subduction zone where the oceanic crust eventually melts and is recycled back into the mantle.
Explain why continental crust can displace more of the mantle than oceanic crust can?
Continental crust is generally thicker and less dense than oceanic crust, allowing it to displace more of the mantle beneath it. The buoyancy of continental crust enables it to float higher on the mantle compared to the denser oceanic crust, which sinks deeper into the mantle. Additionally, the composition of continental crust, which includes lighter materials like granite, contributes to its ability to displace a larger volume of mantle. This difference in density and thickness results in continental crust having a greater gravitational pull on the mantle compared to oceanic crust.
What happens when oceanic crust sinks?
When oceanic crust sinks into the mantle at a subduction zone, it melts due to the high temperature and pressure. The molten rock then rises to the surface, forming volcanoes on the overriding plate. This process helps to recycle material back into the mantle and plays a crucial role in plate tectonics.
Continental crust and the difference between oceanic crust?
Oceanic crust is mostly basaltic, which is denser, while continental crust is made from mostly basaltic and sedimentary rocks, which are less dense. This difference in density is why the oceanic crust sinks lower (thus the oceans) and the continental crust rides higher (thus the continents) on the mantle.
What are places where oceanic crust sinks back the the mantle?
A "subduction zone".
Where are the places where oceanic crust sinks back into the mantle.?
A "subduction zone".
What are places where oceanic crust sinks back into the mantle called?
A "subduction zone".
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.
Is magnetic stripes on the ocean floor the places where oceanic crust sinks back to the mantle?
it is right in your book soo... you should be able to answer this
What is the process by which oceanic crust sinks beneath the trenches?
Oceanic crust sinks beneath trenches through a process known as subduction. As oceanic plates collide with continental plates, the denser oceanic plate is forced downward into the mantle due to gravitational pull. This creates a subduction zone where the oceanic crust eventually melts and is recycled back into the mantle.
True or false magnetic stripes on the ocean floor are places where oceanic crust sinks back to the mantle?
True. Magnetic stripes on the ocean floor are created by alternating bands of magnetic polarities in the oceanic crust. These stripes are evidence of seafloor spreading where new crust is formed at mid-ocean ridges, pushing older crust away. Subduction zones are where older crust sinks back into the mantle.
Why does the continental crust float higher on the mantle than on the oceanic crust?
Continental crust is less dense and thicker than oceanic crust, causing it to float higher on the mantle. The continental crust is also compositionally different, with a greater amount of less dense materials like granite compared to the basaltic composition of oceanic crust. This difference in density and composition results in the continental crust floating higher on the mantle.
What force drives the process of pulling dense pieces of oceanic crust downward towards the mantle?
The force driving the process of pulling dense pieces of oceanic crust downward towards the mantle is gravity. As oceanic crust cools and becomes denser, it sinks into the mantle due to gravitational forces. This process is known as subduction.
What happens when oceanic crust sinks?
When oceanic crust sinks into the mantle at a subduction zone, it melts due to the high temperature and pressure. The molten rock then rises to the surface, forming volcanoes on the overriding plate. This process helps to recycle material back into the mantle and plays a crucial role in plate tectonics.
Continental crust and the difference between oceanic crust?
Oceanic crust is mostly basaltic, which is denser, while continental crust is made from mostly basaltic and sedimentary rocks, which are less dense. This difference in density is why the oceanic crust sinks lower (thus the oceans) and the continental crust rides higher (thus the continents) on the mantle.
