Igneous Rocks Like Granite Can Become Gneiss

Gneiss is a metamorphic rock granite is an igneous rock and sandstone is a sedimentary rock.

Igneous rocks like granite can become gneiss.

The parent rock can be either sedimentary igneous or even another metamorphic rock. Gneiss can turn into an igneous rock if it is melted. A photograph of polished gneiss from the stock of a countertop vendor. Gneiss ˈ n aɪ s is a common and widely distributed type of metamorphic rock gneiss is formed by high temperature and high pressure metamorphic processes acting on formations composed of igneous or sedimentary rocks orthogneiss is gneiss derived from igneous rock such as granite.

Paragneiss is gneiss derived from sedimentary rock such as sandstone. The mineral constituents that create these rocks get recycled over time. All rocks undergo a series of processes called the rock cycle where one type of rock changes into another. If this occurs it will now be classified as a granite.

Granite is a light colored igneous rock with grains large enough to be visible with the unaided eye. Granite gneiss can also form through the metamorphism of sedimentary rocks. Granite is an igneous rock whereas gneiss is formed after metamorphosis of an existing igneous rock. The mineral composition of both granite and gneiss is same but alteration of granite because of very high pressure and temperature leads to the formation of gneiss.

These rocks primarily consist of quartz feldspar and mica. If the chemistry and conditions are right granite forming minerals can precipitate. The end product of their metamorphism is a banded rock with a mineralogical composition like granite. Not all gneiss is obtained from granite and there are also diorite.

More fleshed out fuller and still correct answer. Granite is composed mainly of quartz and feldspar with minor amounts of mica amphiboles and other minerals this mineral composition usually gives granite a red pink gray or white color with dark mineral.