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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.
Wiki User
∙ 13y ago
Wiki User
∙ 15y agoAfter studying rock samples, scientists have determined that the mantle is made mostly of the elements silicon, oxygen, iron, and magnesium.
Wiki User
∙ 11y agoHot lava that may sometimes seep onto earth through volcanoes. But the lava also creates volcanoes whether they are underwater or on land
Wiki User
∙ 13y agoVery hot rock under eminence pressures very close to melting point if not semi-melted.
Wiki User
∙ 14y agoLiquid rock mainly iron
Wiki User
∙ 13y agoOlivine.
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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!)
What is the most expansive layer of the Earth?
The Earth's mantle comprises the bulk of the Earth.
How do you make a sentence with upper mantle?
The crust and upper mantle make up the earth.
What is crust and upper mantle of the EARTH?
The upper mantle is in between the lower mantle and the earths crust Crust- the outer most solid shell of the earth. The Uppermost mantle and the earth's crust form the lithosphere.
Is earth made up of several layers?
It has 4 layers. Earth layers consist of upper mantle, lower mantle, outer core and inner core.
What is upper layer made of?
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!)
What is made of layer?
upper layer is made of mantle of the earth.
What layers of earth makes up the lithosphere?
Crust and the upper mantle
Is the second layer of the earth the upper mantle or the lower mantle?
upper mantle
What is the most expansive layer of the Earth?
The Earth's mantle comprises the bulk of the Earth.
Which of the Earth's layers is located just below the mantle?
Upper Mantlemantle
Does magma come from the upper mantle or inner core of the earth?
upper mantle
Are convection currents found in the upper or lower mantle of earth?
The upper mantle
What is the upper mantle made of?
The upper mantle is made of something called peridodite.
What the upper mantle made of?
The upper mantle is made of something called peridodite.
How do you make a sentence with upper mantle?
The crust and upper mantle make up the earth.
