0
Yes. Bigger crystals=Intrusive. Smaller crystals=Extrusive.
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
Why would you except the crystals in a intrusive rock to be larger than the crystals in a extrusive rock?
Minerals formed in intrusive rock cool more slowly than extrusive rock, which is closer to the surface. The longer cooling period allows more time for crystal formation.
Is it true that intrusive rocks have similar crystals than extrusive rocks?
no. Extrusive rocks are usually have bigger crystals and a rougher texture, unless you notice obsidian and another type of extrusive rock don't have crystals, at all
What are extrusive rocks and intrusive rocks?
Extrusive rocks are formed outside of earths surface. Intrusive rocks are formed inside earths surface.
Why is intrusive rock usually harder than extrusive rock?
Intrusive rocks are under pressure so they are usually harder.
Is this true or false Intrusive rocks have smaller crystals than extrusive rocks?
Generally, false. Intrusive rocks cool far more slowly than extrusive ones, so the crystals have time to grow larger.
What is the difference in crystal growth between intrusive and extrusive igneous rock?
The crystal growth of intrusive igneous is substantially more so than extrusive igneous. Magma cools quicker on the earth's surface, extrusive igneous formed, as opposed to below the crust, intrusive. Therefore the longer it takes to cool the magma, the more the crystal growth.
How does the rate of cooling influence crystal size of igneous rocks and how does that help you to distinguish between intrusive and extrusive igneous rocks?
The longer that magma is able to cool, the larger the crystals will be. Intrusive rocks will have larger crystals than extrusive rocks. For example granite (intrusive) has larger grains than rhyolite (extrusive).
Why would you except the crystals in a intrusive rock to be larger than the crystals in a extrusive rock?
Minerals formed in intrusive rock cool more slowly than extrusive rock, which is closer to the surface. The longer cooling period allows more time for crystal formation.
Is it true that intrusive rocks have similar crystals than extrusive rocks?
no. Extrusive rocks are usually have bigger crystals and a rougher texture, unless you notice obsidian and another type of extrusive rock don't have crystals, at all
Extrusive rocks which cool more rapidly than intrusive rocks generally have?
Extrusive rocks which cool more rapidly than intrusive rocks generally have smaller crystals.
Does intrusive rocks have smaller minerals than extrusive rocks?
No. Intrusive rocks have larger crystals because the magma would have taken longer to cool and solidify than extrusive magma.
What are extrusive rocks and intrusive rocks?
Extrusive rocks are formed outside of earths surface. Intrusive rocks are formed inside earths surface.
Why is intrusive rock usually harder than extrusive rock?
Intrusive rocks are under pressure so they are usually harder.
Is this true or false Intrusive rocks have smaller crystals than extrusive rocks?
Generally, false. Intrusive rocks cool far more slowly than extrusive ones, so the crystals have time to grow larger.
Why is a volcano an extrusive igneous feature rather than an intrusive feature?
A volcano is composed of material that cooled and solidified at the surface, which makes it extrusive.
Why is intrusive rock harder than a extrusive igneous rock?
The rocks are underground so intrusive rocks are under pressure so its harder.
Is conglomerate intrusive or extrusive?
Neither. Conglomerate is a sedimentary rock. Intrusive and extrusive are descriptive terms used to classify igneous rocks.
