by Jenny SMember since:October 28, 2008Total points:6,522 (Level 5)
A magma which cools rapidly will comprise small to microscopic crystals and generally be homogeneous.
A magma which chills slowly will not only form larger crystals, but may also have time to differentiate - that is for some of the earliest crystallised materials to settle through the magma chamber if there is an adequate density contrast between minerals. This results in different compositional rock types, layering within the body, and alignment of alongate crystals. Slower cooling magmas also have the possibility of forming late stage products such as aplitic and pegmatitic bodies. They also have time to alter themselves or the adjacent rocks by passing reactive fluids through themselves and the country rock.
Source(s):The rate of cooling affects the crystal size of the minerals in the igneous rocks. Slower cooling, larger crystals. Fast cooling, small crystals.
Igneous rocks form when hot magma cools inside or outside the earth. So, the cooling of magma affects them by creating them.
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Igneous rocks are formed by cooling magma.
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.
Igneous rock is formed from the cooling and solidification of magma or lava.
No. Igneous rock forms from the cooling of magma.
ybyg
Rocks formed by crystallization from a melt (magma).
Quick cooling of magma results in small crystal formation. Slow cooling magma results in larger crystals.
Igneous rocks are formed by cooling magma.
The length of time the magma had to cool
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.
Igneous rock is formed from the cooling and solidification of magma or lava.
No. Igneous rock forms from the cooling of magma.
Not from the magma, no. Cooled and solidified magma is classified as igneous. However, metamorphic rocks can be formed as the heat and hot fluids of intruding magma affect the properties and possibly the chemistry of the existing "country rock" into which it comes in contact. This process is called contact metamorphism.
Cooling and solidifying magma turns into igneous rock.
Igneous rock is formed through the cooling and solidification of magma or lava.
Magma cooling beneath the surface creates intrusive igneous rocks.