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Metamorphic rocks are created from rocks that are deformed by tectonic forces and/or are brought to temperature that are much different from those that they were first formed in (usually hotter).
The effect of increased temperature is the growth of minerals from others that are no longer stable under the changed pressure and temperature conditions (e.g. diamond is formed from graphite under very high pressure and garnet growths at high temperatures and pressures from aluminium rich usually sedimentary rocks).
The effect of shear stress on the rock (i.e. directed force creating not only compression but also deformation) is the change of shape of minerals as well as rotation and alignment of platy minerals into bands. These processes lead to the usually banded appearance of metamorphic rocks.
Wiki User
∙ 11y ago
Wiki User
∙ 12y agosay if you have a sedimentary rock and it turns to a metamorphic rock what it needs is heat and pressure for a igneous rock turn to a metamorphic rock is the same as a sedimentary it squeezes down on the rock.
Wiki User
∙ 8y agowhen rock changes into metamorphic rock, its appearance, texture, crystal structure, and mineral content changes.
Wiki User
∙ 9y agoMetamorphism refers to the process of altering the composition or structure of a rock by heat, pressure, or other natural agency. During metamorphism, minerals align into layers.
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During metamorphism of granite into gneiss what happens to the minerals?
With the extreme heat and pressure causing the metamorphism into gneiss, the constituent minerals recrystallize into bands, usually alternating from light colored to dark, perpendicular to the direction of the pressure which is being applied. The exact cause of the banding is not fully understood at this time.
Describe how contact metamorphism is different from regional metamorphism?
contact metamorphism is what happens when something is really hot. regional metamorphism on the other hand involves much larger packages of rocks.
What two properties of rock change during metamorphism?
The properties of temperature and pressure both change when rocks undergo metamorphism. Re-crystallization and chemical reactions also occur during metamorphism.
What process can occur during metamorphism?
everything
When Minerals that crystallize at high temperatures as a result of contact metamorphism tend to be found near?
Igneous Intrusions
Do minerals partly melt during metamorphism?
no
What happens to minerals if you continued heating them after metamorphism?
they turn in rocks
Why does the color of sedimentary rock change during metamorphism?
The color of sedimentary rock changes during metamorphism due to minerals. New minerals introduced can change the color of the rock.
During metamorphism of granite into gneiss what happens to the minerals?
With the extreme heat and pressure causing the metamorphism into gneiss, the constituent minerals recrystallize into bands, usually alternating from light colored to dark, perpendicular to the direction of the pressure which is being applied. The exact cause of the banding is not fully understood at this time.
What happens to minerals during metamorphism of granite into gneiss?
With the extreme heat and pressure causing the metamorphism into gneiss, the constituent minerals recrystallize into bands, usually alternating from light colored to dark, perpendicular to the direction of the pressure which is being applied. The exact cause of the banding is not fully understood at this time.
During metamorphism of granite gneiss what happens to minerals?
With the extreme heat and pressure causing the metamorphism into gneiss, the constituent minerals recrystallize into bands, usually alternating from light colored to dark, perpendicular to the direction of the pressure which is being applied. The exact cause of the banding is not fully understood at this time.
What is the planar alignment of minerals due to differential stress during metamorphism?
Foliation
What is recrystallization process?
A process by which bonds between atoms in minerals break and reform in new ways during metamorphism.
Where does the water involved in melting at subduction zones come from?
Water contained within minerals in the subducting plate is released during metamorphism.
Metamorphism occurs at hotspots where magma rises up through Earth.?
Contact
What is the difference between contact and metamorphism?
Contact metamorphism is metamorphism that happens when preexisting rock comes in contact with a molten rock or magma and it melts locally.Regional metamorphism is metamorphism happens when two plates collide the plate that subducts can melt by the heated area.
How is metamorphism different from regional metamorphism?
contact metamorphism is what happens when something is really hot. regional metamorphism on the other hand involves much larger packages of rocks.
