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How fast do coarse grained and fine grained rocks cool?
If the rocks are igneous then in general:- Coarse = slowly. Fine = fast. However if the rocks are metamorphic or sedimentary then grain size has nothing to do with cooling and indicates other things.
Are igneous rocks heavy?
Not as heavy as metamorphic but it really depends on the type of igneous rock and the size
What are 3 characteristics of a rocks grain?
1.Grain Size 2.Grain Shape 3.Grain Pattern
What determines the mineral grain size in an igneous rock?
The cooling rate of the rock.
How igneous rock classified?
Geologists classify rocks by where they are formed; above ground or under ground
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 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.
How fast do coarse grained and fine grained rocks cool?
If the rocks are igneous then in general:- Coarse = slowly. Fine = fast. However if the rocks are metamorphic or sedimentary then grain size has nothing to do with cooling and indicates other things.
What effect does a fast cooling rate have on grain size in igenous rocks?
Fast cooling lava or magma creates an aphanitic or small crystal (grain) textured igneous rock.
What are rough textured rocks?
Rocks with a large grain size perhaps with angular grain shapes.
What are fine textured rocks?
They are rocks with a small 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.
Are igneous rocks heavy?
Not as heavy as metamorphic but it really depends on the type of igneous rock and the size
What would not be used to classify igneous rocks?
crystal size
What are 3 characteristics of a rocks grain?
1.Grain Size 2.Grain Shape 3.Grain Pattern
