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Is gabbro an intrusive or extrusive igneous rock how do you know?
Wiki User
∙ 14y ago
Intrusive, or plutonic, based upon the size of the crystals. Intrusive igneous rocks tend to have larger and more developed crystals than volcanic igneous rocks because of minimal exposure to air, causing the magma to cool more slowly.
Wiki User
∙ 14y ago
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During the rock cycle what forms when magma cools?
When magma cools you get intrusive igneous rock. Think of other ig words you know. Ignite, ignition they all mean heat. Igneous rocks are formed from rocks that have been heated so much they melt. When they cool they make new, igneous, rocks. If it's magma that cools that means it's still under the earth's crust so the igneous rock is intrusive. If it's lava that cools after flowing down a volcano it's an extrusive igneous rock that's formed.
What are four Mafic Igneous rocks?
The four I know of are: gabbro, basalt, peridotite, and dolerite.
What are the 3 types of rock are in volcanoes?
Igneous rocks exhibit three types of textures: coarse grained (intrusive), fine grained (extrusive), and porphyritic (two-stage solidification of mineral constituents). Chemically, they are categorized as felsic, mafic, or intermediate.
Are intrusive rocks rough and coarse?
Intrusive igneous rocks are formed from slow cooling of magma. The additional time spent in a liquid state allows for the creation of larger mineral crystals. A rock with larger mineral crystals is said to have a coarse texture.
You find a volcanic rock that is fairly smooth and only has a few small holes made when gas and water vapor escaped as the rock cooled you know that the rock can be classified as?
The rock described would be classified as an extrusive mafic igneous rock.
During the rock cycle what forms when magma cools?
When magma cools you get intrusive igneous rock. Think of other ig words you know. Ignite, ignition they all mean heat. Igneous rocks are formed from rocks that have been heated so much they melt. When they cool they make new, igneous, rocks. If it's magma that cools that means it's still under the earth's crust so the igneous rock is intrusive. If it's lava that cools after flowing down a volcano it's an extrusive igneous rock that's formed.
How do extrusive and intrusive appear different?
i dont know shut ap
How do intrusive and extrusive rock different?
i dont know shut ap
What are four igneous rocks?
The four I know of are: gabbro, basalt, peridotite, and dolerite.
How do intrusive and extrusive rock appear different?
i dont know shut ap
4 most commenly know igneous rocks?
Granite, Basalt, Gabbro, and Obsidian
What are four Mafic Igneous rocks?
The four I know of are: gabbro, basalt, peridotite, and dolerite.
What are 3 ways extrusive and intrusive different?
Intrusive rocks are from the magma INSIDE of the volcano. Extrusive rocks are from the OUTSIDE of the volcano. I don't know 2 other ways but by the way I learned this in 4th grade?!
What group of rocks does granite belong to?
Granite is classified as an intrusive igneous rock.
Is obsidian an instrusive or extrusive igneous rock how do you know?
Obsidian is an extrusive rock and is formed from rapidly cooling magma. Obsidian is also known as volcanic glass and one can find only sub-microscopic crystals in it. This is because it was cooled too fastly for large crystals to form. If the material that obsidian consists of were an intrusive rock and had a lot of time to cool down, one would find that it would be composed of easily visible crystals.
How are the textures of extrusive and intrusive igneous rocks different?
Extrusive igneous rocks have come to the surface when cooling down. Intrusive igneous rocks stay within the earth. This difference is important. When a magma comes to the surface, it's called a lava. On the surface, the lava will be subject to cooling by wind and water. This will happen fast. When a magma stays inside the earth, it will cool down considerably slower, because it has to radiate it's heat to the rest of the earth. This doesn't go fast because while water and air can flow, rock can't. The texture of an igneous rock has everything to do with the cooling speed. As a magma or a lava cools, it forms crystals. When the cooling happens relatively fast, these crystals do not have a lot of time to grow together, so you will get a lot of small crystals. When the cooling is very slow, the crystals will have more time to grow, and the crystal size will be a lot bigger. Take for instance granite. If you've ever seen it, you know you can see the crystals with the naked eye, because they are very large. Basalt, on the other hand has a very fine structure, you can't see the crystals without magnifying equipment like a microscope. So there you have it: an extrusive igneous rock will have a very fine texture, with small crystal sizes, an intrusive igneous rock will have a very coarse texture, with large crystal sizes.
Which rocks do you know?
i am 14 and i belive that the rocks i know are sedimentary,ignious,metimorophic,hope i helped! :) ADDED ON BY STOCKYROCKY: All rocks, like he said are either Igneous, Sedimentary or metamorphic. There are 2 types of Igneous rock, Intrusive and Extrusive. Intrusive rocks (granite) have cooled slowly underground, so have large crystals since they have time to grow. Extrusive rocks cool on the surface (lava flow) and so cool quickly and have little time to form crystals. Sedimentary rocks are made when bits of rock are lithified (made into a rock). This usually happens in rivers and in shallows seas where the sediment has been brought out into the sea. Metamorphic were either Igneous or Sedimentary rocks that have been metamorphosed into a metamorphic rock. This can either be done by contact metamorphism (when it is heated up) or by regional metamorphism (by pressure). This pressure and/or heat is what changes it. There are a few more but they are a bit complicated and rare. Hopefully you got through that
