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Do intrusive rocks have large crystals because they cool quickly?
Wiki User
∙ 9y ago
No. Intrusive igneous rocks have large crystals because they cool slowly.
Wiki User
∙ 9y ago
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How can you tell if a intrusive rock forms?
Large crystals are diagnostic of an intrusive igneous rock, as large crystals form as the source magma cools slowly.
Is it extrusive rock that can have smooth texture because it is formed from lava that cooled so quickly that large crystals did not have time to form or is it intrusive?
It is extrusive rock that can have a smooth texture because it is formed from lava that cooled quickly on the Earth's surface, preventing large crystals from forming. Intrusive rocks form from magma that cools slowly beneath the Earth's surface, allowing larger crystals to develop.
Do intrusive rocks have fine grains small crystals or large crystals?
Intrusive rocks generally have larger crystals because they cool slowly beneath the Earth's surface, allowing for more time for crystal growth. This slower cooling process allows minerals within the rock to form larger crystals compared to extrusive rocks that cool quickly at the surface and have finer-grained texture.
What type of crystals form in intrusive rocks?
large,well developed crystals.This is because of slow cooling process
Can magmas be classified as intrusive or extrusive?
Yes, magmas can be classified as intrusive or extrusive. Intrusive magmas form underground as the magma cools slowly, resulting in large crystals. Extrusive magmas, on the other hand, cool quickly on the Earth's surface, leading to fine-grained or glassy textures like obsidian or basalt.
Are large crystals intrusive or extrusive igneous rock?
Large crystals are typically characteristic of intrusive igneous rocks, which form beneath the Earth's surface from slow cooling of magma. Extrusive igneous rocks cool quickly at or near the Earth's surface, resulting in smaller crystals or glassy textures.
How can you tell if a intrusive rock forms?
Large crystals are diagnostic of an intrusive igneous rock, as large crystals form as the source magma cools slowly.
Is it extrusive rock that can have smooth texture because it is formed from lava that cooled so quickly that large crystals did not have time to form or is it intrusive?
It is extrusive rock that can have a smooth texture because it is formed from lava that cooled quickly on the Earth's surface, preventing large crystals from forming. Intrusive rocks form from magma that cools slowly beneath the Earth's surface, allowing larger crystals to develop.
Do you think extrusive or intrusive igneous rocks are likely to have larger crystals?
If a rock has large crystals, it is an intrusive rock. Intrusive rocks form underneath the Earth's surface. Magma cools slowly so it has time to form large crystals. An example is granite, where you can see the crystals with your naked eye. Rocks that have small crystals are extrusive rocks. Extrusive rocks are ones that form from lava (blasted out of a volcano) so they cool very quickly, not allowing large crystals to form. An example is obsidian, where you cannot visibly see the small crystals; it just looks like one black, glassy rock.
Do igneous rocks have large crystals?
It depends on the cooling rate of the magma. If the magma cools slowly underground, large crystals can form, creating intrusive igneous rocks. If the magma cools rapidly on the Earth's surface, small crystals or glassy textures can result in extrusive igneous rocks.
What is an example of an intrusive igneous rock with large crystals?
Porphyrite of any composition, granite, gabbro, diorite. Most intrusive igneous rocks have crystals large enough to see with the naked eye. Another term used to define an igneous rock with large crystals is coarse-grained.
What type of crystals form in intrusive rocks?
large,well developed crystals.This is because of slow cooling process
Do intrusive rocks have fine grains small crystals or large crystals?
Intrusive rocks generally have larger crystals because they cool slowly beneath the Earth's surface, allowing for more time for crystal growth. This slower cooling process allows minerals within the rock to form larger crystals compared to extrusive rocks that cool quickly at the surface and have finer-grained texture.
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).
Do igneous rocks have small crystals large crystals or no crystals?
Igneous rocks can have both small and large crystals, depending on how quickly they cool. If an igneous rock cools slowly beneath the Earth's surface, it can form large crystals, while rapid cooling at the Earth's surface or in an eruption can result in small or no visible crystals.
What kind of igneous rock usually contain large crystals?
Intrusive or granite.
How does the crystal sizes of igneous rocks indicate the rate of cooling and whether the rock is extrusive or intrusive?
Igneous rocks with small crystals typically cool quickly, indicating extrusive rock formation. This results in fine-grained textures. In contrast, rocks with large crystals cool slowly, pointing to intrusive rock formation and coarse-grained textures. The size of the crystals in igneous rocks is directly related to the rate of cooling during their formation.
