Is Granite A Extrusive Igneous Rock

What is the comparison of granite and basalt in terms of origin and texture which is intrusive and which is extrusive.

Is granite a extrusive igneous rock.

The way granite is formed and the elements it is composed of is what makes it an intrusive rock and not an extrusive one. Nps photo by georgia hybels. Intrusive rocks form from molten material magma that flows and solidifies underground where magma cools slowly. The two main categories of igneous rocks are extrusive and intrusive.

You may use your charts forms in rifts or oceanic hotspots. Extrusive rocks are formed on the surface of the earth from lava which is magma that has emerged from underground. You may use your igneous rock identification chart scoria. The formation of different types of granite is one of the most interesting natural occurrences taking place underneath the surface.

Petrographic examination is required for identification of specific types of granitoids. Granite is an intrusive igneous rock. Basalt can t see crystals and basalt. Dark colored diabase dikes intrude through light colored granite at acadia national park maine.

Intrusive or plutonic igneous rock forms when magma remains inside the earth s crust where it cools and solidifies in chambers within pre existing rock. The amount of magnesium and iron. The extrusive igneous rock equivalent of granite is rhyolite. A granitic rock with a porphyritic texture is known as a granite porphyry.

Although geologists would do a chemical analysis before identifying andesite in a published paper in the field they readily call a gray or medium red extrusive igneous rock andesite. Extrusive igneous rocks erupt onto the surface where they cool quickly to form small crystals. Intrusive igneous rocks crystallize below earth s surface and the slow cooling that occurs there allows large crystals to form. For example two rocks from identical magma can become either rhyolite or granite depending on whether they cool quickly or slowly.

Which is an example of an extrusive igneous rock. Intrusive rocks are formed from magma that cools and solidifies within the crust of the planet. Some cool so quickly that they form an amorphous glass. On the other hand intrusive igneous rocks form from magma that cooled slowly deep.

Granite is an intrusive igneous rock. Eventually the overlying rocks are removed exposing the granite. Examples of intrusive igneous rocks are diabase diorite gabbro granite pegmatite and peridotite. Intrusive igneous rock.

Extrusive igneous rocks form from magma that erupted onto the surface as lava where it cooled quickly.