The main characteristic to look for is mineral crystal size. Extrusive rock will exhibit an aphanitic texture, where individual crystals are not visible without magnification. Intrusive rock will exhibit phaneritic texture, where individual crystals are visible without magnification.
Igneous intrusiverocks form when magma cools and crystallizes within the earth. Rocks cool slowly inside the earth and this time allows large crystals to form. Intrusive rocks have large visible grains (phaneritic). Examples of intrusive igneous rocks are granite, gabbro and diorite.Igneous extrusive rocks form when lava cools and crystallizes on the earth's surface. Since cooling happens very rapidly on the earth's surface extrusive rocks have a very fine grained (aphanitic) appearance. Examples of extrusive igneous rocks are pumice, obsidian and basalt.
Extrusive rock comes out of the volcano and hardens very quickly on the Earths surface. It forms on the Earth's surface
Intrusive rocks pushes its way up the chambers. It doesn't erupt out. It forms under the Earth's surface.
intrusive rock is formed under surface of the rock by the cooling of magma.common example of intrusive rock is granite,they usually have large crystals of mica and other crystals.granite is grey in color
extrusive rocks are formed by the cooling of magma on the surface of the earth's crust.Basalt is a common example of extrusive igneous locks.They form small crystals.Basalt is black in color
By position rather than lithology.
Intrusive: the magma solidified underground, having been forced into place.
Extrusive: erupted on the land surface or sea-floor by volcanoes.
it depends on wether it cools slowly-below surface or if it cools slowly on Earths surface
Andesite is considered an extrusive igneous rock.
intrusive
Intrusive Igneous rock because it is made of granite and granite is intrusive igneous rock
Igneous rock formed from cooling magma below the surface is called intrusive igneous rock.
Two types: Extrusive igneous rock and Intrusive igneous rock.
Diorite is an intrusive igneous rock. Its extrusive equivalent is andesite.
Neither, Igneous rock is either intrusive or extrusive. Thats what intrusive and extrusive is... A igneous rock.
Andesite is considered an extrusive igneous rock.
intrusive
Extrusive igneous rock is one of two different types of igneous rocks. The other kind is intrusive igneous rock. Intrusive igneous rock is formed when magma in Earth's lithosphere cools and hardens. Extrusive igneous rock is formed when lava on Earth's surface cools and hardens.
Intrusive Igneous rock because it is made of granite and granite is intrusive igneous rock
It is neither. Intrusive and extrusive are terms used to describe igneous rock.
Intrusive
Intrusive: An intrusive igneous rock is formed from magma undergroundExtrusive: An extrusive igneous rock is formed from lava outside of the volcano.
extrusive and intrusive
extrusive and intrusive
Peridotite is an intrusive ultramafic igneous rock.