Can Granite Be Metamorphic

Numerous other minerals can be present in granite.

Can granite be metamorphic.

When granite is subjected to intense heat and pressure it changes into a metamorphic rock called gneiss. 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. It is usually composed primarily of the minerals quartz feldspar and mica. These rocks primarily consist of quartz feldspar and mica.

Granite gneiss can also form through the metamorphism of sedimentary rocks. Some examples of metamorphic rocks are gneiss slate marble schist quartzite hornblende and phyllite. Granite is an igneous rock that forms when magma cools relatively slowly underground. Granite ˈ ɡ r æ n ɪ t is a common type of felsic intrusive igneous rock that is granular and phaneritic in texture.

These rocks were cut from the earth in a quarry and have not been subjected to weathering. Gneiss is a metamorphic rock granite is an igneous rock and sandstone is a sedimentary rock. 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. The mineral constituents that create these rocks get recycled over time.

Strictly speaking granite is an. It is about two inches across. Slate is another common metamorphic rock that forms from shale. The pink grains are orthoclase feldspar and the clear to smoky grains are quartz or muscovite.

Most of metamorphic rocks have good crystallization compact textures high strength small porosity and low water permeability. Metamorphic rock can also be formed from tectonic processes such as continental collisions. The specimen above is a typical granite. A photograph of polished gneiss from the stock of a countertop vendor.

The end product of their metamorphism is a banded rock with a mineralogical composition like granite. However lots of igneous and metamorphic rocks will accept a nice polish. Granite ˈ ɡ r æ n ɪ t is a common type of felsic intrusive igneous rock that is granular and phaneritic in texture. The grain size is coarse enough to allow recognition of the major minerals.

The black grains can be biotite or hornblende. The preexisting rocks may be igneous sedimentary or other metamorphic rocks.