Is Granite Extrusive Rock

Komatiite is a very rare and old extrusive igneous rock.

Is granite extrusive rock.

Extrusive rocks are formed on the surface of the earth from lava which is magma that has emerged from underground. Igneous rocks from the greek word for fire form when hot molten rock magma crystallizes and solidifies. Basalt by zureks cc by sa 3 0. See sierra nevada batholith.

For example two rocks from identical magma can become either rhyolite or granite depending on whether they cool quickly or slowly. Some cool so. Examples of intrusive igneous rocks are diabase diorite gabbro granite pegmatite and peridotite. Many mountain ranges such as the sierra nevada in california are formed mostly from large granite or related rock intrusions.

The way granite is formed and the elements it is composed of is what makes it an intrusive rock and not an extrusive one. Intrusions are one of the two ways igneous rock can form. Magma that rises to the surface is called lava. Granite boulders at joshua tree national park california.

Extrusive igneous rocks erupt onto the surface where they cool quickly to form small crystals. Granite is the best example of intrusive rocks whereas the basalt is a fine example of extrusive rocks. The other is extrusive rock that is a volcanic eruption or similar event. Extrusive rock any rock derived from magma molten silicate material that was poured out or ejected at earth s surface.

The formation of different types of granite is one of the most interesting natural occurrences taking place underneath the surface. While basalt rocks split along columnar planes granite rocks give way along horizontal planes. Granite is an intrusive rock while rhyolite is an extrusive rock intrusive rocks are rocks that are formed below the earth s surface extrusive rocks are rocks that are formed on the earth s. Intrusive igneous rocks crystallize below earth s surface and the slow cooling that occurs there allows large crystals to form.

Photo by eva didonato. By contrast intrusive rocks are formed from magma that was forced into older rocks at depth within earth s crust. Basalt is an extrusive igneous rock whereas granite is an intrusive ingenuous rock. Intrusive rocks are formed.

Intrusive rock forms within earth s crust from the crystallization of magma. One other difference between basalt and granite pertains to the way these two types of rocks split when putting under pressure. Magma originates deep within the earth near active plate boundaries or hot spots.