What is the similarities between intrusive and extrusive igneous rock?

Answer 1

Both are formed from the solidification of cooling magma.

Answer 2

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.

Answer 3

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.

Answer 4

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.

Answer 5

They are both igneous rocks, and have an origin from magma.

Answer 6

intrusive and extrusive rocks are alike because they both come from underground magma

Answer 7

They both are formed from the solidification of cooling magma