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The uppermost mantle is connected to the crust and forms the asthenosphere, which composes Earth's tectonic plates. The bulk of the mantle is composed of extremely hot rock under enormous pressure. The mantle may be very close to the melting point of the rock which composes it, or even partially melted. Mantle rock is higher in magnesium and iron than the crust. Rocks in the upper mantle are composed of the minerals olvine, garnet, spinel and pyroxene. With increasing depth, some of these minerals become unstable and are replaced by mineral polymorphs which have the same chemical composition, but different structures.

For more information on the composition of the mantle as a whole, please see the related question.

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What is upper layer made of?

upper layer is made of mantle of the earth.


What is made of layer?

upper layer is made of mantle of the earth.


What is Earth's upper mantle?

The asthenosphere is the upper part of Earth's mantle. It is partially molten (plastic rheology) and mechanically detached from the lithosphere, which is mostly the Earth's crust (but also a little bit of upper mantle). The density of the upper mantle is your mom! (yo mamma!)


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Is the second layer of the earth the upper mantle or the lower mantle?

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How do you make a sentence with upper mantle?

The crust and upper mantle make up the earth.


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Another word for earth's upper mantle is lithosphere.


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The upper mantle is made of something called peridodite.


What the upper mantle made of?

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Are convection currents found in the upper or lower mantle of earth?

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What is the state of the upper mantle?

The upper mantle is a solid layer of rock located beneath the Earth's crust. It is part of the Earth's mantle and extends from the base of the crust to a depth of about 660 kilometers. The upper mantle is mostly composed of peridotite, a dense rock made up of minerals like olivine and pyroxene.