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Both intrusive and extrusive igneous rocks are formed from the solidification of molten magma. They both contain minerals such as quartz, feldspar, and mica. The texture of both types of rocks can vary from fine-grained to coarse-grained.
Extrusive igneous rocks show up as volcanos. Intrusives exist as bodies of igneous rock below ground, such as batholiths, dikes, and sills. Many excellent web pages exist on volcanoes, but as with many things on the web the problem is not finding information, it is sorting through the avalanche of information that exists, and then remembering where you found it. The links below to volcanos are generally very good to excellent.
Web sites for intrusive igneous bodies are not common, and to date I have not found any that have good pictures of the various intrusive types, such as batholiths, sills, dikes, etc. Many pages discuss the kinds of rocks found in the bodies (generally coarse grained ones such as granite, diorite, gabbro) but do not illustrate them.
They are the same in being igneous.
The fundamental difference is in the definition - intrusive rocks remain underground, trapped by the "country rock".
The physical characteristics even from essentially the same magma differ too. Intrusive rocks cool very slowly so are coarse-grained (e.g. pegmatite) whereas lava cools rapidly so has very small crystals.
i think they are alike in some ways because they both form in the earth, also they both have the same steps to make the rock they are, except the only dififference about both of the rocks is that extrusive is in the ground and intrusive is on the surface.
intrusive and extrusive rocks are alike because they both come from underground magma
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Is marble an extrusive or an intrusive rock?
Neither. The terms intrusive and extrusive apply to igneous rocks; marble is metamorphic.
Igneous rocks are described as intrusive or extrusive based on?
Igneous rocks are described as intrusive or extrusive based on formation. Intrusive rocks forms underneath the earth surface, while extrusive rocks forms on the surface of earth.
What type of rock can be intrusive and extrusive?
Igneous rock can be both intrusive and extrusive. Intrusive igneous rocks form from magma that cools beneath the Earth's surface, while extrusive igneous rocks form from lava that cools on the Earth's surface. Examples of intrusive igneous rocks include granite and diorite, while examples of extrusive igneous rocks include basalt and rhyolite.
What are the two category's of igneous rock?
Intrusive and Extrusive
What are igneous rocks that form over the surface?
Rhyolititcen rocks.
What is the difference between an intrusive and an extrusive igneous rocks?
"intrusive" means forced into something, "extrusive" means forced out onto the surface. The igneous magma reaching the surface is therefore extrusive , producing extrusive igneous rocks, and all the rest of the magma is intrusive, producing intrusive igneous rocks.
Which one has large grains between intrusive and extrusive igneous rocks?
intrusive
What is the different between extrusive and intrusive rocks?
Intrusive: An intrusive igneous rock is formed from magma undergroundExtrusive: An extrusive igneous rock is formed from lava outside of the volcano.
Is schist an intrusive or extrusive rock?
Neither, Igneous rock is either intrusive or extrusive. Thats what intrusive and extrusive is... A igneous rock.
What are the main two types of igneous rocks?
Igneous rocks are classified as either extrusive or intrusive. Extrusive rocks form from lava at or above the ground, and intrusive rocks form from magma below the ground. Granite is intrusive, pumice is extrusive.
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.
Is marble an extrusive or an intrusive rock?
Neither. The terms intrusive and extrusive apply to igneous rocks; marble is metamorphic.
Is a metamorphic rock intrusive or extrusive?
It is neither. Intrusive and extrusive are terms used to describe igneous rock.
Is extrusive a rock?
Igneous rocks can be categorized as either extrusive or intrusive.
What are the types of Igneous rock?
extrusive and intrusive
What are the type of igneous rock?
extrusive and intrusive
Igneous rocks are described as intrusive or extrusive based on?
Igneous rocks are described as intrusive or extrusive based on formation. Intrusive rocks forms underneath the earth surface, while extrusive rocks forms on the surface of earth.
