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What is the planar alignment of minerals due to differential stress during metamorphism?
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∙ 9y ago
Foliation
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∙ 9y ago
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What changes occur in shale during regional metamorphism?
The change is in the alignment of the clay minerals and parallel alignment of micaceous minerals, from the stress of compressional forces. The water content of the shale is reduced, increasing the rock's specific gravity, and the alignment of the minerals results in a slaty cleavage.
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.?
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Metamorphic rocks that show layers of dark minerals alternating with layers of light minerals are classified as?
foliated metamorphic rocks. The alternating layers are caused by the alignment and segregation of minerals during the metamorphic process, resulting in a banded or layered appearance. Examples of foliated metamorphic rocks include gneiss, schist, and slate.
Do minerals partly melt during metamorphism?
no
What changes occur in shale during regional metamorphism?
The change is in the alignment of the clay minerals and parallel alignment of micaceous minerals, from the stress of compressional forces. The water content of the shale is reduced, increasing the rock's specific gravity, and the alignment of the minerals results in a slaty cleavage.
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.
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.
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.
Metamorphism occurs at hotspots where magma rises up through Earth.?
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How does the origin of slaty cleavage differ from the origin of fissility in shale?
Slaty cleavage is a result of stress and strain during the metamorphism process where the minerals that make up the slate become deformed and or re-crystallise with an orientation normal to the principle stress field. The fissile nature of shale is a result of the preferential alignment of clay minerals during the formation of the rock. This is because clay minerals are plate like and so form horizontal layers much like you would get if you stacked playing cards.
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
