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What is the relationship between cooling time igneous rocks and the size of its crystals?
Wiki User
∙ 12y ago
Plutonic rocks are intrusive (they solidify before they reach the surface) and have larger crystals because the crystals have had a longer time to accumulate in the heat under the surface.
Volcanic rocks are extrusive (they solidify on or near the surface) and have smaller crystals because the element has less time to accumulate when they cool quickly.
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoWhen magma cools, crystals form because the solution is supersaturated with respect to some minerals. If the magma cools quickly, the crystals do not have much time to form, so they are very small. If the magma cools slowly, then the crystals have enough time to grow and become large. The size of crystals in an igneous rock is an important indicator of the conditions where the rock formed. An igneous rock with large crystals probably indicates that the rock formed deep within the Earth, since it is typically warmer deep inside the Earth than near the surface. These are called intrusive rocks, and they have a phaneritic texture. Similarly, a rock with small crystals probably formed at or near the surface and cooled quickly. These are called extrusive rocks and have an aphanitic texture and some magma cools so quickly that no crystals form; we say that these have a hyaline texture.
Wiki User
∙ 15y agoIf it cools faster, smaller crystals are formed. If it cools for longer, larger crystals are formed.
Wiki User
∙ 12y agoslower cooling results in larger crystals. faster = less crystals because they have less time to form.
Wiki User
∙ 15y agoSlow cooling of magma results in larger crystals. This is because of the extended amount of time a mineral has at it's crystal formation temperature range.
Wiki User
∙ 14y agothe slower the magma cools, the larger the crystal size
Ex: Granite rock
the faster the magma cools, the smaller the crystal size
Ex: Obsidian rock
Wiki User
∙ 12y agofaster cooling, smaller crystals; slower cooling, bigger crystals.
Wiki User
∙ 13y agoThe quicker the molten magma cools (if we are talking about an igneous rock) the smaller the crystals will be and the slower the magma cools the bigger the crystals.
Wiki User
∙ 12y agoThe longer it takes to cool the bigger theve crystals because they have had more time to develope (just finished rocks in science
Wiki User
∙ 11y agoWhen igneous rocks cool as magma crystals are large because of the long time it takes to cool. When they cool as lava the crystals are small because they cool quickly.
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As the rate of cooling of igneous rocks increases the size of the crystals that form?
The size of crystals decreases as the cooling increases. This is called an inverse relationship.
. As the rate of cooling of igneous rocks increases the size of the crystals that form?
The size of crystals decreases as the cooling increases. This is called an inverse relationship.
How is the size of mineral crystals in igneous rock related to the rate at which they cool?
When igneous rocks cool quickly, they have small crystals and have a texture that may be described as aphanitic. When igneous rocks cool slowly, they have much larger crystals and have a texture that may be described as phaneritic or pegmatitic.
What controls the grain size of igneous rock?
The rate at which the igneous rock cools controls grain size. Slower cooling results in larger crystals while faster cooling results in smaller crystals.
What determines crystal size in an igneous rock?
It depends on the cooling of lava. Slow cooling forms big crystals deep under the surface while fast cooling creates small crystals on or just below the earths surface. Itstant cooling wouls have no crystals.
As the rate of cooling of igneous rocks increases the size of the crystals that form?
The size of crystals decreases as the cooling increases. This is called an inverse relationship.
As the rate of cooling of igneous rocks increases the size of the crystals that form .?
The size of crystals decreases as the cooling increases. This is called an inverse relationship.
. As the rate of cooling of igneous rocks increases the size of the crystals that form?
The size of crystals decreases as the cooling increases. This is called an inverse relationship.
How is the size of mineral crystals in igneous rock related to the rate at which they cool?
When igneous rocks cool quickly, they have small crystals and have a texture that may be described as aphanitic. When igneous rocks cool slowly, they have much larger crystals and have a texture that may be described as phaneritic or pegmatitic.
What controls the grain size of igneous rock?
The rate at which the igneous rock cools controls grain size. Slower cooling results in larger crystals while faster cooling results in smaller crystals.
How is the size of crystals in an igneous rock related to the formation of a rock?
If an igneous rock is formed from slowly cooling magma under the ground, it has more time to form crystals and so the crystals it forms are much larger than igneous rock formed from more quickly cooling magma or lava.
Does cooling rate affect solubility?
slower rates of cooling will create larger crystals, rapid cooling allows little time for element accumulation in the crystal, therefore, the crystals created will be smaller. larger, visible crystals in igneous rock indicate that the magma was slow cooling, usually at depth. much smaller crystals in igneous rock indicate rapid cooling of lava, usually at or near the surface. crystals in igneous rock will grow larger and have more to accumulate material for their growth the more they have at their crystallization temperature.
What is the texture of igneous rocks with large crystals that slow cooling produces?
Phaneritic.
What determines crystal size in an igneous rock?
It depends on the cooling of lava. Slow cooling forms big crystals deep under the surface while fast cooling creates small crystals on or just below the earths surface. Itstant cooling wouls have no crystals.
What rate of cooling produces the largest crystals in igneous rocks?
A slow rate of cooling. The slower a magma cools, the longer the crystals have to grow, thus the bigger they will be.
What does grain-size tell you about the cooling history of a rock?
Slower rates of cooling will create larger crystals. Rapid cooling allows little time for element accumulation in the crystal, therefore, the crystals created will be smaller. Larger, visible crystals in igneous rock indicate that the magma was slow cooling, usually at depth. Much smaller crystals in igneous rock indicate rapid cooling of lava, usually at or near the surface. Crystals in igneous rock will grow larger and have more time to accumulate material for their growth the more time they have at their crystallization temperature.
Extremely rapid cooling lavA in which no crystals form?
the reterded mineral
