Is Granite Extrusive Or Intrusive Igneous Rock

Key terms felsic.

Is granite extrusive or intrusive igneous rock.

Extrusive igneous rocks cool and solidify more quickly than intrusive igneous rocks. Gabbro and granite are examples of intrusive igneous rocks. Examples of intrusive igneous rocks are diabase diorite gabbro granite pegmatite and peridotite. Extrusive igneous rocks also known as volcanic rocks are formed at the crust s surface as a result of the partial melting of rocks within the mantle and crust.

Many mountain ranges such as the sierra nevada in california are formed mostly from large granite or related rock intrusions. Igneous rocks are classified into two groups depending upon where the molten rock solidifies. Extrusive igneous rocks erupt onto the surface where they cool quickly to form small crystals. Intrusive or plutonic igneous rocks form when magma cools slowly below the earth s surface most intrusive rocks have large well formed crystals.

Extrusive igneous rocks are formed when molten magma spill over to the surface as a result of a volcanic eruption. The other is extrusive rock that is a volcanic eruption or similar event. Intrusive rock forms within earth s crust from the crystallization of magma. On the other hand intrusive igneous rocks form from magma that cooled slowly deep.

See sierra nevada batholith. Intrusive rocks are very hard in nature and are often coarse grained. Some cool so. They are formed by the cooling of molten magma on the earth s surface.

Extrusive rocks are formed on the surface of the earth from lava which is magma that has emerged from underground. Igneous rocks form from magma that erupted onto the surface as lava where it cooled quickly. Derived from the words feldspar and silica to describe an igneous rock having abundant light colored minerals such as quartz feldspars or muscovite. Intrusive igneous rocks crystallize below earth s surface and the slow cooling that occurs there allows large crystals to form.

Intrusive rocks are formed. The magma on the surface lava cools faster on the surface to form. Examples include granite gabbro diorite and dunite.