0
What is a reason that molten rock at the surface is different in composition from molten rock underground?
Wiki User
∙ 14y ago
Magma is a combination of molten silicate minerals and volatiles (gases) and Lava loses many of these volatiles (gases) when it comes in contact with the atmosphere; hence each has a different chemical composition. This is true. Also, temperature and pressure conditions differ from the surface to underground, so different crystals (that make up the magma and lava) will form. Furthermore, the composition of the magma (below ground) may be different to the lava (above ground), so the resultant rocks may have differing chemical compounds composing them.
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
Does magma cool above ground or beneath?
No. Molten rock under the surface is called magma. Molten rock above the surface is referred to as lava.
What word describes molten rock that is underground?
Molten rock is known as Magma when underground and has not yet been erupted onto the surface.
What is the difference between lava and molten rock?
Molten rock may exist either on the surface or underground. It is only considered lava when it is at the surface. Underground molten rock is called magma.
What is the word for molten rock when it reaches Earth's surface?
It is called lava. Underground it is referred to as magma.
What is subterranean magma?
Subterranean means underground. Magma is molten or partially molten rock that is underground.
One reason that molten rock at the surface is different in composition from molten rock underground is that?
minerals are added as moltenn rocks melt other rocks
What is the surface composition of the inner planets?
The surface composition is made of rock and ice.
Does magma cool above ground or beneath?
No. Molten rock under the surface is called magma. Molten rock above the surface is referred to as lava.
What word describes molten rock that is underground?
Molten rock is known as Magma when underground and has not yet been erupted onto the surface.
What is the difference between lava and molten rock?
Molten rock may exist either on the surface or underground. It is only considered lava when it is at the surface. Underground molten rock is called magma.
What is one reason that molten rock at the surface is different in composition?
How would the lava erupted by mania loa would be expected to erupt
What is the definition of lava?
Molten rock from underground that has risen to the surface. If it is only underground and has not went up, it is called magma.
When is molten rock called lava and when is it called magma?
Molten rock is called magma when it is underground and lava when it reaches the surface.
What is the word for molten rock when it reaches Earth's surface?
It is called lava. Underground it is referred to as magma.
What is subterranean magma?
Subterranean means underground. Magma is molten or partially molten rock that is underground.
What is the name for molten rock when its under the ground?
Molten rock under the surface is called "magma". When magma reaches the surface it is called "lava".
What of rocks form when magma cools below earths surface?
Intrusive igneous rocks
