0
When the magma reaches the surface, it is called lava. The rate at which the magma cools determines the kind of igneous rocks that are formed. Faster cooling surface lava creates rock that is fine grained or aphanitic. The rapid cooling doesn't allow large crystals to form. The slower cooling that takes place underground allows larger crystal formation. Granite is an example of this type of rock formation.
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
Does lava have large or small crystals?
Rocks formed from lava (known as extrusive igneous rocks, because the lava comes to the surface) can be any size - large or small. However, the density of the rock and the size of the crystals making up the rock is informative. Less "thick" (viscous) lava will produce higher-density rocks. The more silicon is contained in the lava/rocks, the thicker it will be. Thinner lava contains more iron and less silicon. The faster a lava cools, the smaller the crystals in the rock will be. By using crystal size in minerals, geologists can determine how fast the lava cooled, which helps to determine the type of eruption and the surface conditions when it occurred.
What is the size of the smallest lava lamp?
The size of the smallest lava lamp is 11.5 inch
When lava cools quickly large crystal form?
No. Small crystals form.
Does crystal content affect viscosity of lava?
Yes, the more numerous and larger the crystals are, the more viscous the lava is: it does not, however, have a very dramatic effect.
Is granite crystal or grain size?
granite's crystal size varies from 1 mm to 10 mm
What does crystal size indicate?
Crystal size in igneous rocks is generally a marker for how long magma or lava took to cool and solidify. Larger crystal size is indicative of slow cooling.
What determines the size of the crystal that form in a sample of granite?
Crystal size in igneous rock is predominately a factor of time spent in cooling from lava or magma. Samples with relatively large crystals are the result of the magma having spent a longer amount of time at ideal crystal forming temperatures for each mineral present.
Does lava have large or small crystals?
Rocks formed from lava (known as extrusive igneous rocks, because the lava comes to the surface) can be any size - large or small. However, the density of the rock and the size of the crystals making up the rock is informative. Less "thick" (viscous) lava will produce higher-density rocks. The more silicon is contained in the lava/rocks, the thicker it will be. Thinner lava contains more iron and less silicon. The faster a lava cools, the smaller the crystals in the rock will be. By using crystal size in minerals, geologists can determine how fast the lava cooled, which helps to determine the type of eruption and the surface conditions when it occurred.
Can lava be a crystal?
Lava itself is not crystalline as it is liquid. Crystals are solid. However, lava can contain crystals of minerals that have started to solidify.
What size bulb does a lava lamp use?
It depends on the size of the lava lamp
What is the size of the smallest lava lamp?
The size of the smallest lava lamp is 11.5 inch
What determines the size of the crystals that form in a sample of granite?
Crystal size in igneous rock is predominately a factor of time spent in cooling from lava or magma. Samples with relatively large crystals are the result of the magma having spent a longer amount of time at ideal crystal forming temperatures for each mineral present.
What type of crystals is formed from slow cooling?
If the magma cools down fastly the crystal size is small because the crystals do not have much time to form. If They magma slows down slowly the crystal size is big because it gives the crystals time to form! :D
When lava cools quickly large crystal form?
No. Small crystals form.
Does crystal content affect viscosity of lava?
Yes, the more numerous and larger the crystals are, the more viscous the lava is: it does not, however, have a very dramatic effect.
An igneous rock with very small minerals crystal most likely formed from?
lava
Is granite crystal or grain size?
granite's crystal size varies from 1 mm to 10 mm
