Can Granite Become Gneiss

What geologic process can change granite into gneiss.

Can granite become gneiss.

Granite gneiss can also form through the metamorphism of sedimentary rocks. Gneiss can turn into an igneous rock if it is melted. Not all gneiss is obtained from granite and there are also diorite gneiss biotite gneiss garnet gneiss and so on. Gneiss is a metamorphic rock created by applying heat and pressure to a number of different rocks including shale and granite.

Though gneiss is sometimes labeled under the broad category of granite by those selling the rock it is not same as granite. Another important structural change is the development of foliation or linear appearance in a gneiss. 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. Granite becomes gneiss after the process of metamorphism well gneiss dosent turn into granite.

This is due to the long minerals in the original granite lining up perpendicular to a regional stress field. The end product of their metamorphism is a banded rock with a mineralogical composition like granite. The change from granite to gneiss is not mineralogical i e. There are no chemical changes but structural.

A photograph of polished gneiss from the stock of a countertop vendor. The view shown in the photo is about 12 inches across. If the chemistry and conditions are right granite forming minerals can precipitate. By heat or pressure sometimes both.

When subjected to intense heat and pressure granite will. Paragneiss is gneiss derived from sedimentary rock such as sandstone. Granite turns into gneiss. If this occurs it will now be classified as a granite.