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What determines the mineral grain size in an igneous rock?
The cooling rate of the rock.
What does phaneritic mean?
Phaneritic refers to igneous rock grain size,which is visible with the naked eye.
What is the grain size of a fine grained igneous rock?
The individual grains (crystals) in quickly cooled magma are described as aphanitic--not visible without magnification.
Are igneous rocks strong?
Igneous rocks can be strong due to their interlocking grain textures
What is the grain size of dacite?
Small to medium grain size.
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 the mineral grain size in an igneous rock?
The cooling rate of the rock.
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 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 a factor that controls grain size in igneous rock?
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.
What is a factor that controls grain size in igneos rocks?
Crystal size in igneous rocks is controlled by the rate of cooling whereby the slower the rate, the larger the size of crystal.
Does grain size mean anything when identifying igneous rocks?
yes, it does. when a grain size in an igneous rock is small, it means that it was probably an extrusive rock, meaning it formed on land. but if the grain size is big, it means that the rock most likely formed underground, or it was intrusive. try remembering it like this- the larger the crystals, the more time the rock had to form, and magma cools faster on land, not giving the rocks much time to form.
What is the grain size of a fine grained igneous rock?
The individual grains (crystals) in quickly cooled magma are described as aphanitic--not visible without magnification.
What grain type is found in extrusive igneous rocks?
Extrusive igneous rocks are usually fine grained.
What does grain size tell you about the orgin and cooling time of an igneous rock?
The larger the crystals, the more time it had to cool because the crystals had more time to grow
What texture does and extrusive igneous rock have?
fined grain texture
