An eruptive rock characterized by the presence of chrysolite (peridot). It also usually contains pyroxene, enstatite, chromite, etc. It is often altered to serpentine.
an ultrabasic (extremely low SiO2) igneous rock, consisting almost entirely of olivine. Approximate composition of the upper mantle.
A granular igneous rock composed essentially of olivine with some form of pyroxene or hornblende. Biotite and chromite are the chief accessory minerals.
a rock that is composed dominantly of the mineral olivine. "Peridote" is the gem name for olivine, a pale olive-green glassy mineral, hence the name "peridotite" for the rock
Principal rock type of the Earth's mantle, rich in iron and magnesium.
A dark-colored, coarse-grained igneous rock that is made up mainly of olivine and pyroxene, with very little quartz or feldspar.
An igneous rock composed primarily of the iron-magnesium silicate olivine and having a silica content of less than 40%.
A dark-colored ultramafic, intrusive, igneous rock of coarse-grained texture, largely composed of olivine; peridotite may also contain other mafic minerals such as pyroxenes, amphiboles or micas.
a dark coarse-grained igneous rock consisting principally of olivine
Diamonds are generally either eclogitic or peridotitic. Peridotitic diamonds are found crystalized in peridotitic source rocks. Peridotites are enriched in chrome and are dominantly composed of olivine, orthopyroxene, clinopyroxene, chromite and pyrope garnet.
It is a class of ultramafic rocks which consists of predominantly olivine. It may be with or without other ferromagnesian (Fe-Mg) minerals.
Dense, coarse-grained rock that consists mostly of the magnesium and iron-silicate minerals olivine and pyroxene.
An igneous rock consisting mostly of the mineral olivine and pyroxene.
A general term for intrusive ultramafic igneous rocks dominantly consisting of olivine and lacking feldspar.
A coarse-grained plutonic rock composed chiefly of olivine with or without other mafic minerals, such as pyroxenes, amphiboles, or micas, and containing little or no feldspar. Peridotite is commonly altered to serpentinite.
Mafic minerals greater than 90
deep eruptive rock composed of olivine and rare pyroxenes.
A mafic igneous rock consisting mainly of the minerals of olivine and pyroxene
aqueous olivin pyroxene rock often containing amphibole, mica, chromite or magnetite
Coarse grained ultramafic igneous rock composed mainly of olivine and pyroxene. The mantle is though to be composed primarily of this rock type.
A rock composed primarily of the mineral olivine. The high percentage of iron and magnesium in olivine creates a very dense rock. Peridotite is the main rock within the mantle.
Peridotite is a dense, coarse-grained rock, consisting mostly of the minerals olivine and pyroxene. Peridotite is ultramafic and ultrabasic, as the rock contains less than 45% silica. It is high in magnesium, reflecting the high proportions of magnesium-rich olivine, with appreciable iron.