Dunite
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Dunite, also known as olivinite, is an intrusive igneous rock of ultramafic composition and with phaneritic texture. The mineral assemblage is greater than 90% olivine, with minor amounts of other min
Small volcanic bomb of (black) basanite with (green) dunite
Igneous rock
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Igneous rock, or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rocks are formed through the cooling and solidification of magma or lava.
Geologic provinces of the world (USGS) Shield Platform Orogen Basin Large igneous province Extended crust Oceanic crust: 0–20 Ma 20–65 Ma >65 Ma
Volcanic eruptions of lava are major sources of igneous rocks. (Mayon volcano in the Philippines, erupting in 2009)
Natural columns of igneous rock separated from each other by columnar joints, in Madeira
Formation of igneous rock