Usually when it meets another tectonic plate at a convergent plate boundary. If the oceanic plate converges with a continental plate the denser oceanic plate will be forced under the continental plate.
If it converges with another oceanic plate the older (and therefore cooler and denser) plate will be forced under the younger plate.
Oceanic crust is denser than continental crust due to its composition and age, causing it to sink lower into the mantle. The oceanic crust is also thinner and has been subjected to more intense heat and pressure, which contributes to its lower position in the mantle compared to the thicker, lighter continental crust.
Continental crust is less dense than oceanic crust, so it floats higher on the mantle. This means that the same thickness of continental crust will displace less mantle compared to oceanic crust. Additionally, continental crust is composed of lighter rocks like granites, while oceanic crust is made of denser rocks like basalt.
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.
i believe it is the crust and upper mantle...
Yes, it is true. Deep-ocean trenches are locations where one tectonic plate is subducted beneath another. Conduction helps transfer the heat from the sinking oceanic crust back into the mantle, contributing to the overall process of plate tectonics and the recycling of Earth's crust.
Oceanic crust sinking under a plate with continental crust
The lithosphere is composed of crust and hard upper mantle. The oceanic lithosphere would be hard upper mantle and basaltic oceanic crust.
The lithosphere is composed of crust and hard upper mantle. The oceanic lithosphere would be hard upper mantle and basaltic oceanic crust.
Oceanic crust gets subducted into the mantle.
The continental crust because it is thicker than the oceanic crust
As the oceanic crust descends beneath the continental crust, the mantle rock is subjected to high pressure and temperature. This causes the mantle rock to partially melt, producing magma that can rise to the surface and form volcanoes. The interaction of the descending oceanic crust with the continental crust can also lead to earthquake activity.
Oceanic crust is denser than continental crust due to its composition and age, causing it to sink lower into the mantle. The oceanic crust is also thinner and has been subjected to more intense heat and pressure, which contributes to its lower position in the mantle compared to the thicker, lighter continental crust.
The main driving force in subduction zones is the gravitational pull on the dense oceanic crust as it subducts beneath less dense continental crust or another oceanic plate. This process is further facilitated by the negative buoyancy of the cold, dense oceanic lithosphere compared to the underlying mantle. Additionally, the sinking of the oceanic crust is also driven by the forces exerted by the movement of the tectonic plates at the surface.
The older oceanic crust moves away from the spreading center and is eventualy subducted back into the mantle.
The older oceanic crust moves away from the spreading center and is eventualy subducted back into the mantle.
the oceanic crust slides down and burns in the mantle and forms a volcano
The older oceanic crust moves away from the spreading center and is eventualy subducted back into the mantle.