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What is the difference between crystal size in intrusive and extrusive igneous rocks?
Wiki User
∙ 12y ago
All rocks are different. Some of those could be the same. It all depends on how fast they harden. Obsidian, for an example, hardens super fast, because it is usually exposed to water and that can take anything from a few minutes to a few days. And granite, for another example hardens deep in the earth, and that takes up to millions on years, so the crystals have more time to grow.
Wiki User
∙ 12y ago
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What is the difference between igneous rock that cools above and igneous rock that cools below ground?
That depends on where it cools. Igneous rock forms from magma or lava (there's a difference!) cools and hardens. Extrusive igneous rock forms above the earth's crust, like when the lava from a volcanic eruption hardens. Intrusive igneous rock cools inside the earth when conditions change and the area around the magma cools allowing the magma to cool.
What is the name of igneous rocks that have large crystals and small crystals?
Large Crystals = Intrusive Small Crystals = Extrusive The name relates to where the minerals were cooled (at at what rate). In the case of intrusive igneous, the rocks were formed above Earth's surface and were thus cooled quickly and the minerals had little time to become defined. Extrusive rocks, therefore, were formed within the Earth's mantle and had a much longer time before being gathered to cool (as they slowly rose to the top).
What is the crystal size for extrusive igneous rocks?
Fine grained
Type of crystal grain that form when molten rock cools quickly?
Small crystal grains form when molten rock cools quickly. In an extrusive igneous rock, it's referred to as aphanitic texture.
What does it mean if an igneous rock has large crystals?
It has cooled slowly under the Earth e.g. in magma chamber. This is why granite has large crystals but extruded/erupted lava only has microscopic crystals since the latter has cooled very quickly.
What is the difference in crystal growth between intrusive and extrusive igneous rock?
The crystal growth of intrusive igneous is substantially more so than extrusive igneous. Magma cools quicker on the earth's surface, extrusive igneous formed, as opposed to below the crust, intrusive. Therefore the longer it takes to cool the magma, the more the crystal growth.
Write the difference between extrusive and intrusive igneous rocks?
igneous Extrusive is cool on the outside of the crust and cools quickly before crystal forms igneous Intrusive is cool on the inside of the crust and cools slowly and allowing crystal to form
Is an intrusive crystal bigger than an extrusive crystal?
Yes. Bigger crystals=Intrusive. Smaller crystals=Extrusive.
What size crystal do magma make?
it depends on if it is intrusive or extrusive (intrusive is below the earth and extrusive is at or above the earth) intrusive has a bigger crystal because it takes time to cool down.
Is graphite rock extrusive or intrusive?
GRAPHITE is a native mineral. It is metamorphic and it is effectively the highest grade of coal.
How does the rate of cooling influence crystal size of igneous rocks and how does that help you to distinguish between intrusive and extrusive igneous rocks?
The longer that magma is able to cool, the larger the crystals will be. Intrusive rocks will have larger crystals than extrusive rocks. For example granite (intrusive) has larger grains than rhyolite (extrusive).
Which crystal can help identify as igneous rock as intrusive or extrusive?
What is the effect of location on crystal size? Label the location of intrusive and extrusive igneous rocks on the diagram below. Then, illustrate the crystal size of the rock formed at that location in the appropriate callout circles.
How are intrusive rock different from with extrusive rocks?
Intrusive Rocks Intrusive rocks are characterized by large crystal that forms deep underground. Extrusive Rocks They are characterized by fine-grained textures because their rapid cooling at or near the surface.
Is lava intrusive or extrusive?
A pluton is intrusive, meaning that it is below ground. Other words to describe a pluton would be batholith or laccolith.
What type igneous is pumice intrusive small crystal or extrusive large crystal?
It is neither. Pumice is an extrusive highly vesicular igneous rock composed of volcanic glass and very tiny mineral crystals.
Why would you except the crystals in a intrusive rock to be larger than the crystals in a extrusive rock?
Minerals formed in intrusive rock cool more slowly than extrusive rock, which is closer to the surface. The longer cooling period allows more time for crystal formation.
Igneous rock are classified based upon their?
There are two types of igneous rocks; intrusive and extrusive. Intrusive igneous rocks are formed underneath the earth's surface from magma where it cools slower and develops large crystal structures. Extrusive igneous rocks are formed above the earth's surface from lava that cools quickly and creates rocks with smaller, finer crystal structures.
