What Causes Granite To Turn Into Gneiss

There are no chemical changes but structural.

What causes granite to turn into gneiss.

Another important structural change is the development of foliation or linear appearance in a gneiss. Granites at the surface are exposed to weathering in which they break down into mostly quartz and feldspars. Granite turns into gneiss. When subjected to intense heat and pressure granite will.

Well gneiss dosent turn into granite. With still more metamorphism gneisses can turn to migmatite and then totally recrystallize into granite. 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.

Minerals are seen arranged in bands in gneiss. Not all gneiss is obtained from granite and there are also diorite gneiss biotite gneiss garnet gneiss and so on. Granite gneiss can also form through the metamorphism of sedimentary. Heat and pressure cause granite to become gneiss and change sandstone into quartzite.

Gneiss is a metamorphic rock granite is an igneous rock and sandstone is a sedimentary rock. If it is part of a mountain it gets weathered eroded and transported to the ocean. More fleshed out fuller and still correct answer. 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.

Intense heat and pressure can also metamorphose granite into a banded rock known as granite gneiss this transformation is usually more of a structural change than a mineralogical transformation. By heat or pressure sometimes both. By heat or pressure sometimes both. These minerals are then transported in streams and rivers and often end up as sediments in the oceans.

Metamorphic rocks form from heat and pressure which changes the original or parent rock into a completely new rock. This is due to the long minerals in the original granite lining up perpendicular to a regional stress field. Well gneiss dosent turn into granite. If the granite gets buried deep in the crust it often changes to a gneiss.

Despite its highly altered nature gneiss can preserve chemical evidence of its history especially in minerals like zircon which resist metamorphism. The appearance of granular minerals is what marks the transition into gneiss.