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It depends on if it is intrusive or extrusive.
If it is an intrusive rock, it is formed when magma hardens under the earth and has a larger grain size.
If it is an extrusive rock, it is formed when lava hardens on the earth's surface and has a smaller grain size.
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∙ 12y ago
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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 basalt different from gabbro?
Basalt is an Extrusive Igneous Rock, it is a fine grained textured rock, While Gabbro is an Intrusive Igneous Rock and it has a Coarse grain texture.
Igneous rock that cools very quickly when it forms may have a texture that is what?
smooth and shiny with no visible grain.
Igneous rock that cools very quickly when it forms may have a texture that is?
Smooth and shiny with no visible grain.
What is the grain size of an extrusive igneous?
It depend what rock it is but extrusive rocks generally non-crystalline or have a grain size of less than 1 mm
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 are the factors that controls most texture in igneous rocks?
magma or lava controls most texture in igneous rock
What determines the mineral grain size in an igneous rock?
The cooling rate of the rock.
What texture does and extrusive igneous rock have?
fined grain texture
Are igneous rocks strong?
Igneous rocks can be strong due to their interlocking grain textures
What does it mean for an igneous rock to have fine grain?
it means unfoliated that's my answer
How is basalt different from gabbro?
Basalt is an Extrusive Igneous Rock, it is a fine grained textured rock, While Gabbro is an Intrusive Igneous Rock and it has a Coarse grain texture.
What happens to the grain when igneous rock cools more quickly and solidifies?
it getys harder
What does phaneritic mean?
Phaneritic refers to igneous rock grain size,which is visible with the naked eye.
How can you determine if a igneous rock has had an intrusive or extrusive origin?
== Grain size. Most intrusive igneous rocks will have visible crystals. Crystals in most extrusive igneous rocks are not easily visible.
What is the grain size of an extrusive igneous?
It depend what rock it is but extrusive rocks generally non-crystalline or have a grain size of less than 1 mm
What grain structure does gneiss have?
Gneiss which is a non-foliated meta-igneous rock is coarse grained in texture.
