What element is the special feature of the upper mantle?

What element is the special feature of the upper mantle?

Answer: Its chemical composition is very similar to the crust. One difference is that rocks and minerals of the mantletend to have more magnesium and less silicon and aluminum than the crust. The first four most abundant elements in the upper mantle are oxygen, magnesium, silicon, and iron.

What is the special features of mantle?

It is mostly solid rock, but less viscous at tectonic plate boundaries and mantle plumes. Mantle rocks there are soft and able to move plastically (over the course of millions of years) at great depth and pressure. The transfer of heat and material in the mantle helps determine the landscape of Earth.

What is unique about the upper mantle?

Its chemical composition is very similar to the crust. One difference is that rocks and minerals of the mantle tend to have more magnesium and less silicon and aluminum than the crust. The first four most abundant elements in the upper mantle are oxygen, magnesium, silicon, and iron.

What does the upper mantle contains?

Upper mantle material that has come up onto the surface comprises about 55% olivine and 35% pyroxene, and 5 to 10% of calcium oxide and aluminum oxide. The upper mantle is dominantly peridotite, composed primarily of variable proportions of the minerals olivine, clinopyroxene, orthopyroxene, and an aluminous phase.

What are the main features of mantle and core?

MOVEMENT IN MANTLE CAUSES VOLCANIC ERUPTIONS AND EARTHQUAKES. THE CORE,BENEATH THE MANTLE,IS THE DEEPEST AND HOTTEST LAYER OF THE EARTH.IT IS ALMOST ENTIRELY MADE OF METAL.IT HAS TWO LAYER: THE INNER CORE AND THE OUTER CORE. THE OUTER CORE BORDERS THE MANTLE. THE INNER CORE IS SHAPED LIKE A BALL.

What makes up the mantle?

silicate rocks
Mantle. The mantle under the crust is about 1,800 miles deep (2,890 km). It is composed mostly of silicate rocks rich in magnesium and iron. Intense heat causes the rocks to rise.

What causes the difference between the upper mantle and lower mantle?

The mantle is the layer of the Earth’s interior between the crust or surface and the innermost core. The upper and lower mantle differ from each other in location, temperature and pressure.

What are facts about the upper mantle?

The upper mantle extends from the crust to a depth of about 410 kilometers (255 miles). The upper mantle is mostly solid, but its more malleable regions contribute to tectonic activity. Two parts of the upper mantle are often recognized as distinct regions in Earth’s interior: the lithosphere and the asthenosphere.

What is the definition of upper mantle?

upper mantle – the upper part of the mantle layer – a relatively thin sheetlike expanse or region lying over or under another mantle – the layer of the earth between the crust and the core

What is the upper mantle of the Earth?

Mantle. The upper mantle is primarily peridotite. Peridotite is an iron-rich rock that contains a high percentage of olivine. The mantle extends from the lithosphere to the core of the Earth. It is 2,890 kilometers thick and contains 84% of the Earth’s volume. It is divided into the upper mantle and lower mantle.

What is the thickness of the upper mantle?

The thickness of the upper mantle is about 640 km (400 mi). The entire mantle is about 2,900 km (1,800 mi) thick, which means the upper mantle is only about 20% of the total mantle thickness. Cross section of the Earth, showing the paths of earthquake waves.