Peridotite (US: / ˈ p ɛ r ɪ d oʊ ˌ t aɪ t, p ə ˈ r ɪ d ə-/ PERR-ih-doh-tyte, pə-RID-ə-) is a dense, coarse-grained igneous rock consisting mostly of the silicate minerals olivine and pyroxene.Peridotite is ultramafic, as the rock contains less than 45% silica.It is high in magnesium (Mg 2+), reflecting the high proportions of magnesium-rich olivine, with appreciable iron.

Sep 4, 2023 · Peridotite is a type of ultramafic igneous rock that is primarily composed of the mineral olivine, along with smaller amounts of other minerals such as pyroxenes and amphiboles. It is one of the main rock types found in the Earth’s mantle, which is the layer of the Earth that lies below the crust.

Jul 12, 2023 · Peridotite is a predominant rock in the Earth’s upper mantle at depths up to 400km, with only a minor yet important part of the Earth’s crust or surface. Depths beyond 400 km will convert olivine to wadsleyite.

Peridotite is a generic name used for coarse-grained, dark-colored, ultramafic igneous rocks. Peridotites usually contain olivine as their primary mineral , frequently with other mafic minerals such as pyroxenes and amphiboles.

Peridotite is the ultimate source of all chromium ore and naturally occurring diamonds, and of nearly all chrysotile asbestos. It is one of the main host rocks of talc deposits and platinum metals and formerly was a major source of magnesite.

May 8, 2018 · Peridotite is a dark-colored, coarse-grained igneous rock believed by many scientists to be the primary rock of the exterior of Earth's mantle. The rock typically forms in volcanic pipes and is forced to the surface from great depths during a volcanic eruption.

A peridotite is an ultramafic rock containing more than 40% olivine (Mg 2 SiO 4). A general term for 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 the dominant rock of the Earth's mantle above a depth of about 400 km. Below that depth, olivine is converted to a higher-pressure mineral. Oceanic plates consist of up to about 100 km of peridotite covered by a thin crust.

Peridotite is a plutonic rock, it is mostly composed of visible mineral grains. Other notable minerals that are often present are chromite , garnet , and plagioclase. It is an ultramafic rock (mafic minerals make up more than 90% of the rocks composition).

Peridotite is an igneous type of rock that is composed primarily of olivine. Peridotite has a coarse grain and may contain small amounts of other elements, such as spinel, chromite and plagioclase and amphibole.