What can happen to a granite that undergoes weathering?

What can happen to a granite that undergoes weathering?

What happens when granite is weathered? The biotite and/or amphibole will undergo hydrolysis to form clay, and oxidation to form iron oxides.

How granite might be transformed into a sedimentary rock?

Granite forms from solidified silicic magma within the Earth’s crust. It can be exhumed (brought toward the surface through erosion of the rock layers above and uplift through faulting). Once the granite is exposed it is subject to weathering and erosion, linking to the sedimentary part of the rock cycle.

How does gneiss undergo metamorphism?

Gneiss usually forms by regional metamorphism at convergent plate boundaries. It is a high-grade metamorphic rock in which mineral grains recrystallized under intense heat and pressure. Finally, the platy micas begin to recrystallize into granular minerals.

What process is necessary in order for granite to undergo weathering and erosion?

Wind. Wind, water and ice denude the soil and Earth’s crust overlying the granite mass, exposing it to the atmosphere. The rock expands and contracts in reaction to changes in temperature. It shatters on the surface and the fractures widen to form crevices.

What happens when granite is eroded and deposited?

If it is part of a mountain, it gets weathered, eroded and transported to the ocean. If the granite gets buried deep in the crust it often changes to a gneiss.

What erodes granite?

Chemical weathering of granite occurs when dilute carbonic acid, and other acids present in rain and soil waters, alter feldspar in a process called hydrolysis.

How does gneiss turn into shale?

How Does Gneiss Form? Gneiss usually forms by regional metamorphism at convergent plate boundaries. It is a high-grade metamorphic rock in which mineral grains recrystallized under intense heat and pressure. Regional metamorphism can transform shale into slate, then phyllite, then schist, and finally into gneiss.

How does granite change into a metamorphic rock?

Consider how granite changes form. Granite is an igneous rock that forms when magma cools relatively slowly underground. It is usually composed primarily of the minerals quartz, feldspar, and mica. When granite is subjected to intense heat and pressure, it changes into a metamorphic rock called gneiss.

When does granite turn into gneiss what happens?

Granite forms when liquid magma slowly cools within Earth’s crust. If the granite is exposed to intense heat and pressure, it can change to gneiss. How are granite and gneiss related?

Which is type of change takes place when granite turns into…?

This is due to the long minerals in the original granite lining up perpendicular to a regional stress field. When subjected to intense heat and pressure, granite will metamorphose into gneiss. Both are made of mostly feldspar and quartz, containing a lot of aluminium, silicon and oxygen.

How is a schist different from a gneiss rock?

Schist is a metamorphic rock usually formed originally from shale. It is a step above gneiss in the metamorphic process, meaning schist has been subjected to less intense heat and pressure. After metamorphism, the schist is very foliated (the minerals of the rock are arranged in layers).