What Causes Granite To Turn Into Gneiss

Short succinct and correct answer.

What causes granite to turn into gneiss.

All rocks undergo a series of processes called the rock cycle where one type of rock changes into another. By heat or pressure sometimes both. Gneiss is a metamorphic rock granite is an igneous rock and sandstone is a sedimentary rock. There are no chemical changes but structural.

When subjected to intense heat and pressure granite will. 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. 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. Metamorphic rocks form from heat and pressure which changes the original or parent rock into a completely new rock. Well gneiss dosent turn into granite. If it is part of a mountain it gets weathered eroded and transported to the ocean.

Granite turns into gneiss. By heat or pressure sometimes both. These rocks primarily consist of quartz feldspar and mica. Despite its highly altered nature gneiss can preserve chemical evidence of its history especially in minerals like zircon which resist metamorphism.

With still more metamorphism gneisses can turn to migmatite and then totally recrystallize into granite. Another important structural change is the development of foliation or linear appearance in a gneiss. The change from granite to gneiss is not mineralogical i e. These minerals are then transported in streams and rivers and often end up as sediments in the oceans.

Granite gneiss can also form through the metamorphism of sedimentary. More fleshed out fuller and still correct answer. Minerals are seen arranged in bands in gneiss. Granite turns into gneiss.

Heat and pressure cause granite to become gneiss and change sandstone into quartzite. Granites at the surface are exposed to weathering in which they break down into mostly quartz and feldspars.