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What rock does the upper mantle contain?
The dominant rock type of the upper mantle is peridotite.
Which region of the earth interior does the heat increase to the point that rocks can begin to melt?
In which region of the Earth's interior does the heat increase to the point that rocks can begin to melt?
In which region of the Earth's interior does the heat increase to the point that rocks can begin to melt?
The heat increases to the point that rocks can begin to melt in the lower part of the Earth's mantle, known as the asthenosphere. This is where the temperature and pressure conditions allow for rocks to melt and form magma.
What does most magma forms from?
Most magma forms from the partial melting of Earth's mantle rocks. As these rocks are subjected to high temperatures and pressures in the mantle, certain minerals melt at different temperatures, leading to the formation of magma.
Why is the lower mantle more rigid and dense then the asthenosphere in the upper mantle?
The lower mantle is more rigid and dense than the asthenosphere in the upper mantle because of higher pressure and temperature conditions. The increased pressure in the lower mantle prevents rocks from flowing as easily as in the asthenosphere. This leads to higher density and rigidity in the lower mantle region.
Why don't rocks in earth's lower crust upper crust and mantle melt?
The rocks don't melt because they are under tremendous pressure. High pressure raises the temperature needed to melt something.
How do upper mantle rock differ from lower mantle rock?
the upper-mantle rocks are heavier while the lower mantle rocks are semisolid like melted plastic
How do upper mantle rocks differ from lower mantle rock?
the upper-mantle rocks are heavier while the lower mantle rocks are semisolid like melted plastic
What causes the rocks in the mantle at divergent boundaries to melt?
Rocks in the mantle at divergent boundaries melt due to the decrease in pressure as tectonic plates move apart. This reduction in pressure lowers the melting point of the rocks, causing them to melt and form magma.
What produces the heat necessary to melt rocks in the mantle?
Pressure
When rocks are pushed down into the mantle and melt it become?
When rocks are pushed down into the mantle and melt, they become magma. Magma is molten rock located beneath the Earth's surface.
What causes the rock in the mantle at divergent boundaries to melt?
The crust stretches and gets thinner so the pressure decreases on the mantle rocks below this causes part of the mantle to melt
What magma compositions will be produced by partial melting of the upper mantle?
Partial melting of the upper mantle primarily produces basaltic magma compositions. This occurs because the upper mantle is rich in ultramafic rocks, which contain high levels of magnesium and iron. As these rocks partially melt, the resulting magma is typically low in silica and has a higher density, leading to basaltic compositions. This process is commonly associated with mid-ocean ridges and hotspot volcanism.
What rock does the upper mantle contain?
The dominant rock type of the upper mantle is peridotite.
Magma forms when rocks begin to melt?
Yes. Magma is underground molten rock.
Why is the upper mantle solid?
the entire mantle is solid because the pressure is so great the rock are unable to melt.
Which region of the earth interior does the heat increase to the point that rocks can begin to melt?
In which region of the Earth's interior does the heat increase to the point that rocks can begin to melt?
