Intrusive igneous rocks by definition, are formed and set underground. As well as the well-crystallized Granites and Basalts, they also include rapidly-chilled rocks such as dykes and sills.
Extrusive igneous rocks have been deposited on the Earth's surface, and include all the usual volcanics.
Diorite is an intrusive igneous rock. Its extrusive equivalent is andesite.
Extrusive means that the lava has come out and cooled on the surface. Intrusive means that the lava has cooled in the Earth i.e. underground.
intrusive forms below the earths surface, and extrusive above
Porphyritic igneous rocks can display both intrusive and extrusive characteristics.
Intrusive
"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.
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.
igneous Extrusive is cool on the outside of the crust and cools quickly before crystal forms igneous Intrusive is cool on the inside of the crust and cools slowly and allowing crystal to form
intrusive
Intrusive igneous rocks cool beneath the crustal surface. Extrusive cool above the surface - pillow lavas cool below the sea but above the crust.
Diorite is an intrusive igneous rock. Its extrusive equivalent is andesite.
Extrusive means that the lava has come out and cooled on the surface. Intrusive means that the lava has cooled in the Earth i.e. underground.
Intrusive: An intrusive igneous rock is formed from magma undergroundExtrusive: An extrusive igneous rock is formed from lava outside of the volcano.
intrusive forms below the earths surface, and extrusive above
Andesite is considered an extrusive igneous rock.
Porphyritic igneous rocks can display both intrusive and extrusive characteristics.
Neither, Igneous rock is either intrusive or extrusive. Thats what intrusive and extrusive is... A igneous rock.