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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.
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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?
Oceanic crust is primarily made of basalt and is more dense than continental crust. It is also younger and thinner compared to continental crust.
What layer of the Earth is made up of the rocks basalt and granite?
The Earth's outermost layer where basalt and granite are found is called the crust. Basalt is more common in the oceanic crust, while granite is more prevalent in the continental crust.
What is the mafic rock that is full of holes and made of dense materials is?
The mafic rock that is full of holes and made of dense materials is basalt. Basalt is formed from lava that has rapid cooling, which traps gas bubbles inside the rock.
The layer of Earth made up largely of the rocks basalt and granite is the?
The crust.
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 crust beneath the ocean made up basalt?
yes, it is made up of basalt, if that was your question.... ;)
What is mid ocean ridge molten rocks made out of?
Basalt. Basalt - Wikipedia, the free encyclopedia
What is the main mineral type that the oceanic plates are made of?
mostly made of basalt.
What types of rock are oceanic plates are made of?
It is made of Basalt.
What is the rossetta stone made of?
It is made of Black Polished Basalt
Which type of crust is primarily made of basalt and is more dense?
Oceanic crust is primarily made of basalt and is more dense than continental crust. It is also younger and thinner compared to continental crust.
What can basalt be made into?
It is only used for decuration
What was the Aztec Sun Stone made out of?
Basalt
What is a volcano most likely made of?
basalt
Is basalt an element a mineral or a rock?
Basalt is a rock composed of minerals which are composed of elements.
What is the rock that makes up most of oceanic crust?
Most of the oceanic crust is made of peridotite. Some basalt and gabbro may also be found.
