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Peridotite is an ultramafic rock (less than 45% silica) and mainly contains the minerals olivene (a magnesium iron silicate - (Mg,Fe)2SiO4) and pyroxene (XY(Si,Al)2O6 where x may be calcium, sodium, iron or magnesium) and so as can be seen from the chemistry of the two primary minerals contains significant amounts of magnesium and iron.
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What is the heaviest rock in the world?
The heaviest rock in the world is thought to be a type of metamorphic rock called peridotite. Peridotite is found in the Earth's mantle and can be denser than other types of rocks due to its high iron and magnesium content.
What layer is Composed of peridotite?
The layer composed of peridotite is the mantle, which is located between the Earth's crust and core. Peridotite is the main rock type found in the upper mantle and is rich in minerals such as olivine and pyroxene.
What is the upper most mantle rock like?
The uppermost mantle rock is known as peridotite. It is composed mainly of the minerals olivine and pyroxene. Peridotite is denser than the rocks of the Earth's crust and is believed to be the main rock type in the upper mantle.
What rock does the upper mantle contain?
The upper mantle consists mainly of ultramafic rocks such as peridotite, which is rich in olivine, pyroxenes, and feldspar. These rocks are dense and typically dark in color due to their composition.
What rock contains high density minerals such as olivine?
Mafic, igneous rocks
