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The continental and oceanic plates are primarily igneous rock. The continental crust is granitic and the oceanic crust is basaltic.

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15y ago

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Do continents reach the bottom of the ocean?

They do touch the ocean floor. they're like a giant mound, and the beaches flow into the water.


What evidence in rock supports the theory of seafloor spreading?

Convergence supports the theory of seafloor spreading. Samples of the deep ocean floor are evidence of seafloor spreading because the basaltic oceanic crust and overlapping sediment become younger as the mid-ocean ridge is approached. Also, the rock that makes up the floor of the ocean is younger than the continents.


What layer of the earth makes up these plates and what layer are these continents sliding on?

The plates on the top of the upper mantle are referred to as the lithosphere, which slides on the asthenosphere.well the mantle causes the continents to move on the ocean floor and sand it makes it slideyea know the crustti is i dont ge ehttt


A rock that makes up much of the ocean floor?

basalt


What layer of the earth makes up these plates and what layer are the continents are sliding on?

The plates on the top of the upper mantle are referred to as the lithosphere, which slides on the asthenosphere.well the mantle causes the continents to move on the ocean floor and sand it makes it slideyea know the crustti is i dont ge ehttt


What rocks make up the continent floor?

The continental plate, which is made of granite rock, makes up the continents.


What layer of the earths make up these plates and what layer are are the continents sliding on?

The plates on the top of the upper mantle are referred to as the lithosphere, which slides on the asthenosphere.well the mantle causes the continents to move on the ocean floor and sand it makes it slideyea know the crustti is i dont ge ehttt


Iron rich volcanic rock that makes up much of the ocean floor is?

Basalt is the iron-rich volcanic rock that makes up much of the ocean floor. It forms from the cooling and solidification of magma that erupts through underwater volcanic activity, such as mid-ocean ridges. Basalt is a key component of Earth's oceanic crust.


What evidence in rocks supports the theory seafloor spreading?

Convergence supports the theory of seafloor spreading. Samples of the deep ocean floor are evidence of seafloor spreading because the basaltic oceanic crust and overlapping sediment become younger as the mid-ocean ridge is approached. Also, the rock that makes up the floor of the ocean is younger than the continents.


What type igneous rock makes up most of the ocean floor?

Basalt


Most of the ocean floor is made up of the?

Most of the ocean floor is made up of ocean plains.


Is ocean floor smooth?

The ocean floor is not smooth.The ocean floor is made up of rocks, ledges and ditches.