Is Granite Extrusive Rock

Examples of intrusive igneous rocks are diabase diorite gabbro granite pegmatite and peridotite.

Is granite extrusive rock. Intrusions are one of the two ways igneous rock can form. Granite is the best example of intrusive rocks whereas the basalt is a fine example of extrusive rocks. The way granite is formed and the elements it is composed of is what makes it an intrusive rock and not an extrusive one. Intrusive rock forms within earth s crust from the crystallization of magma.

Igneous rocks from the greek word for fire form when hot molten rock magma crystallizes and solidifies. Basalt is an extrusive igneous rock whereas granite is an intrusive ingenuous rock. The other is extrusive rock that is a volcanic eruption or similar event. Extrusive rocks are formed on the surface of the earth from lava which is magma that has emerged from underground.

Intrusive igneous rocks crystallize below earth s surface and the slow cooling that occurs there allows large crystals to form. Extrusive igneous rocks erupt onto the surface where they cool quickly to form small crystals. Basalt by zureks cc by sa 3 0. While basalt rocks split along columnar planes granite rocks give way along horizontal planes.

Many mountain ranges such as the sierra nevada in california are formed mostly from large granite or related rock intrusions. Intrusive rocks are formed. Komatiite is a very rare and old extrusive igneous rock. Some cool so.

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. For example two rocks from identical magma can become either rhyolite or granite depending on whether they cool quickly or slowly. An extrusive igneous rocks definition states these rocks form when magma exits and cools above or very near the earth s surface examples of extrusive igneous rocks include basalt andesite rhyolite dacite obsidian pumice and scoria. The molten material then slowly solidifies below earth s surface where it may later be exposed through erosion.

Extrusive rock any rock derived from magma molten silicate material that was poured out or ejected at earth s surface. Magma that rises to the surface is called lava. Magma originates deep within the earth near active plate boundaries or hot spots. Photo by eva didonato.

The formation of different types of granite is one of the most interesting natural occurrences taking place underneath the surface. One other difference between basalt and granite pertains to the way these two types of rocks split when putting under pressure. See sierra nevada batholith.