How is gneiss rock formed?

Answer 1

Gneiss is formed from pre-existing rocks that are subjected to intense directional pressure and heat, causing an alignment of their constituent minerals into parallel bands, a texture that is referred to as foliation.

Answer 2

Gneiss rock is formed from high-grade metamorphism of existing rock, particularly in regions where extreme temperature and pressure cause the mineral composition to re-crystallize. This process occurs deep in the Earth's crust over millions of years, leading to the distinctive banded appearance associated with gneiss.

Answer 3

Gneiss is a high grade metamorphic rock, which means it has been subjected to higher temperatures and pressures than schist. Itâ??s formed by the metamorphosis of granite, or sedimentary rock.

Answer 4

When subjected to heat and pressure shale metamorphoses into slate. Then slate into phyllite, phyllite into shist, and finally shist into gniess. Gniess is the final form. It has light and dark layers.

Alternatively, gneiss may alos form when granite or a similar igneous rock is subjected to great heat and pressure.

Answer 5

Slate is a metamorphic rock. Metamorphic rocks are rocks that change form from one type of rock into another because of time, pressure, heat and other factors. Other metamorphic rocks include slate, shale, schist, gneiss and marble. The new form of a rock is determined by the composition of the original rock. Shale doesn't automatically turn into slate. It must be kept away from certain chemicals and kept at a certain temperature, or it will become another type of rock as the pressure, heat, and chemical action continue over long periods of time. Shale at first becomes slate, but given enough time, pressure and heat, it will continue to change into phyllite, schist and then gneiss.

Answer 6

Gneiss can turn into an igneous rock if it is melted. If the chemistry and conditions are right, granite-forming minerals can precipitate. If this occurs, it will now be classified as a granite.

Answer 7

Gneiss is formed when granite undergoes the process of metamorphism. Gneiss is a type of metamorphic rock, which is characterized by its unique foliation.

Answer 8

Gneiss is a metamorphic rock that is sometimes formed by recrystallizing and deforming granite (metamorphism).

intrusive

Answer 9

Granite becomes gneiss after the process of metamorphism

Answer 10

Underground from different types of rocks. It is a metamorphic rock which can be created by granite, slate and shale.