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Basalt (pronounced /bəˈsɔːlt, ˈbeisɔːlt, ˈbæsɔːlt/) is a common extrusive volcanic rock. It is usually grey to black and fine-grained due to rapid cooling of lava at the surface of a planet. It may be porphyritic containing larger crystals in a fine matrix, or vesicular, or frothy scoria. Unweathered basalt is black or grey.
On Earth, most basalt magmas have formed by decompression melting of the mantle. Basalt has also formed on Earth's Moon, Mars, Venus, and even on the asteroid Vesta. Source rocks for the partial melts probably include both peridotite and pyroxenite (e.g., Sobolev et al., 2007). The crustal portions of oceanic tectonic plates are composed predominantly of basalt, produced from upwelling mantle below ocean ridges.
The term basalt is at times applied to shallow intrusive rocks with a composition typical of basalt, but rocks of this composition with a phaneritic (coarse) groundmass are generally referred to as diabase (also called dolerite) or gabbro.
Wiki User
∙ 14y ago
Wiki User
∙ 11y ago1. Dark colored Minerals:
a. Pyroxene.
b. Olivine.
2. light colored minerals:
a. Feldspar.
b. Quartz.
Wiki User
∙ 13y agoBasalt is "cooled lava" - a volcanic rock in abundance on both the earth and the moon (most of the samples brought back from the moon were basalt).
Wiki User
∙ 10y agoBasalt is used in construction (building blocks, facades, cobblestones) or can be heated and extruded to form stone wool.
Wiki User
∙ 12y agobasalt is made out of volcanic rocks
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What is the main mineral type that the oceanic plates are made of?
mostly made of basalt.
Which type of crust is primarily made of basalt and is more dense?
Continental is made mostly of granite. Oceanic is made mostly of basalt and gabbro.
Describe oceanic plate?
The definition of an oceanic plate is a tectonic plate plate made mostly of basalt? and I'm not so sure what basalt is but I think it's water.The Oceanic plate is the plate which lies under the ocean. It is made of basalt,which is a heavy rock.
What has a lower density rhyolite or basalt?
Ryholite due to the reason that this rock is made up of lighter elements than that of Basalt
The foundations of continents are made mostly of basalt?
false
What is a sentence using the word 'basalt'?
That rock was not Basalt, it was different. This is not a diamond, just a normal Basalt.
What is the main mineral type that the oceanic plates are made of?
mostly made of basalt.
What is the crust beneath the ocean made up basalt?
yes, it is made up of basalt, if that was your question.... ;)
Which type of crust is primarily made of basalt and is more dense?
Continental is made mostly of granite. Oceanic is made mostly of basalt and gabbro.
What is mid ocean ridge molten rocks made out of?
Basalt. Basalt - Wikipedia, the free encyclopedia
What famous statues are made from basalt?
soulja boy tell em
What kind of rock is found in a shield volcano?
Shield volcanoes are made primarily of basalt.
What is the rossetta stone made of?
It is made of Black Polished Basalt
What types of rock are oceanic plates are made of?
It is made of Basalt.
What rock is a obsidian and basalt?
Obsidian and Basalt are both Igneous rocks. They are made from hardened lava from volcanoes.
What was the Aztec Sun Stone made out of?
Basalt
What can basalt be made into?
It is only used for decuration
