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How may foliation occur in metamorphic rock?
The foliation is caused by the massive force of pressure and high temperature which results from mountain building processes caused by plate collisions. The heat and pressure combine to realign the existing minerals from a random orientation to one of parallel orientation, thus creating the visible lines or platy cleavages found in foliated metamorphic rocks. The lines of foliation are created perpendicularly to the force being applied.
How is foliation formed?
Folaiation is caused then flat mineral grains or crystals line up to form a plane in the body of the rock. This can happen during sedimentation or during deformation/metamorphosis.
Why do minerals in metamorphic rocks often rearrange in layers?
The alignment of minerals into bands (foliation) is caused by the massive force of pressure and high temperature which results from mountain building processes caused by plate collisions. The heat and pressure combine to realign the existing minerals from a random orientation to one of parallel orientation, thus creating the visible lines or platy cleavages found in foliated metamorphic rocks. The lines of foliation are created perpendicularly to the force being applied.
What causes foliation on a metamorphic rock under what cirumstances would you expect this to happen?
Foliation is created when pressure pushes different parts of the rock in different directions.
How will foliation in continental metamorphic rocks formed during subduction be oriented?
perpendicular to the direction of plate movement :)
Is foliation caused by direct pressure?
Yes, foliation is caused by directed pressure in rocks. This pressure aligns minerals in the rock, resulting in a layered or banded appearance. Foliation is common in metamorphic rocks and is a result of the rocks being subjected to deformation under pressure.
What is metamorphic foliation?
Metamorphic foliation is a preferred orientation of mineral grains within a metamorphic rock caused by pressure during metamorphism. This alignment creates a parallel arrangement of minerals, giving the rock a layered or banded appearance. Foliation helps geologists understand the history and deformation conditions of rocks during metamorphism.
How may foliation occur in metamorphic rock?
The foliation is caused by the massive force of pressure and high temperature which results from mountain building processes caused by plate collisions. The heat and pressure combine to realign the existing minerals from a random orientation to one of parallel orientation, thus creating the visible lines or platy cleavages found in foliated metamorphic rocks. The lines of foliation are created perpendicularly to the force being applied.
Which type of metamorphosis makes non-foliated rocks?
Contact metamorphism does not often produce the foliation caused by regional metamorphism
What is salty foliation?
Slaty foliation, is a type of parallel foliation consisting of fine-grained platy minerals. The direction of foliation is usually perpendicular to the direction of maximum stress.
Which property of the gneiss sample prevented it from weathering?
The property of foliation in gneiss, caused by its alternating layers of minerals, makes it resistant to weathering. This foliation gives gneiss a strong and cohesive structure, preventing the rock from easily breaking down in response to weathering processes.
How is the orientation of foliation related to stress?
The foliation in metamorphic minerals is always perpendicular to the direction of pressure. E.g. Vertical pressure is applied, the foliation will be horizontal, and vice-versa, the pressure is horizontal you get vertical foliation. From yahoo answers
What is saltiness?
Slaty foliation, is a type of parallel foliation consisting of fine-grained platy minerals. The direction of foliation is usually perpendicular to the direction of maximum stress.
Difference between schistose foliation and gneiss-to foliation?
A schistose foliation would be found in a metamorphic rock with a large amount of micaceous minerals, creating a flaky texturing with easily cleavable layers. Gneiss is more coarse in texture, not as easily cleavable along planes, and contains less micaceous minerals.
Do conglomerate have foliation?
With a good eye you maybe could see one but usually they do not exhibit a foliation.
Is a strong parallel alignment of different mineral bands in a metamorphic rock?
The strong parallel alignment of different mineral bands in a metamorphic rock is called foliation. Foliation is caused by differential stress during the rock's formation, resulting in minerals aligning perpendicular to the direction of stress to create distinct layers or bands. This alignment gives the rock a banded appearance and is a key characteristic used to classify metamorphic rocks.
How is foliation produced in a metamophic rocks?
Foliation is caused by heat and pressure being applied to the parent rock. The heat and pressure combine to realign the existing minerals from a random orientation to one of parallel orientation, thus creating the visible lines or platy cleavages found in foliated metamorphic rocks. The lines of foliation are created perpendicularly to the force being applied.
