Can Granite Be Metamorphic

The end product of their metamorphism is a banded rock with a mineralogical composition like granite.

Can granite be metamorphic.

Granite ˈ ɡ r æ n ɪ t is a common type of felsic intrusive igneous rock that is granular and phaneritic in texture. Slate is another common metamorphic rock that forms from shale. A photograph of polished gneiss from the stock of a countertop vendor. Granite is an igneous rock that forms when magma cools relatively slowly underground.

When granite is subjected to intense heat and pressure it changes into a metamorphic rock called gneiss. It is about two inches across. Metamorphic rock can also be formed from tectonic processes such as continental collisions. Granite gneiss can also form through the metamorphism of sedimentary rocks.

The mineral constituents that create these rocks get recycled over time. The black grains can be biotite or hornblende. The preexisting rocks may be igneous sedimentary or other metamorphic rocks. Most of metamorphic rocks have good crystallization compact textures high strength small porosity and low water permeability.

Numerous other minerals can be present in granite. Metamorphic rock any rock that results from the alteration of preexisting rocks in response to changing conditions such as variations in temperature pressure and mechanical stress and the addition or subtraction of chemical components. Think of all of the granite gneiss pegmatite and marble that is cut polished and used for countertops windowsills floor tiles cemetery markers and architectural uses. Gneiss is a metamorphic rock granite is an igneous rock and sandstone is a sedimentary rock.

The specimen above is a typical granite. Granites can be predominantly white pink or gray in color depending on their mineralogy the word granite comes from the latin granum a grain in reference to the coarse grained structure of such a completely crystalline rock. Strictly speaking granite is an. The pink grains are orthoclase feldspar and the clear to smoky grains are quartz or muscovite.

However lots of igneous and metamorphic rocks will accept a nice polish. All rocks undergo a series of processes called the rock cycle where one type of rock changes into another. These rocks primarily consist of quartz feldspar and mica. Granite ˈ ɡ r æ n ɪ t is a common type of felsic intrusive igneous rock that is granular and phaneritic in texture.

Granites can be predominantly white pink or gray in color depending on their mineralogy. The grain size is coarse enough to allow recognition of the major minerals.