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How will foliation in continental metamorphic rocks formed during subduction be oriented?
perpendicular to the direction of plate movement :)
What rock formed from high pressure with bands of minerals?
Foliated metamoprhic rocks such as gneiss form under high pressure conditions and contain bands of minerals (foliation).
Foliation is caused by?
Foliation in rocks refers to the process being split into thin sheets. It is caused by intense pressure that shapes rocks to align in particular directions.
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 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.
Foliation is the arrangement of minerals in?
Foliation is the arrangement of minerals in a rock that results in a layered or banded appearance. It is commonly formed in metamorphic rocks through processes like pressure and temperature causing mineral alignment. Foliation is a key characteristic used to classify and identify different types of metamorphic rocks.
What is an example of foliation?
An example of foliation is the parallel alignment of minerals in a metamorphic rock, such as schist or gneiss. This alignment results from the pressure and temperature conditions during the rock's formation, creating a layered or banded appearance.
How will foliation in continental metamorphic rocks formed during subduction be oriented?
perpendicular to the direction of plate movement :)
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.
What describes the thin flat layering found in most metamorphic rocks?
The thin flat layering found in most metamorphic rocks is called foliation, and it is formed due to the alignment of mineral grains or the presence of alternating layers of different mineral compositions. Foliation is a common feature in rocks that have undergone high pressure and temperature conditions, leading to the development of a layered structure.
Why don't all rocks have foliation?
Not all rocks exhibit foliation because foliation is primarily a characteristic of metamorphic rocks that have been subjected to directed pressure and temperature, causing minerals to realign into parallel layers. Igneous rocks, which form from the cooling of molten material, and sedimentary rocks, which are formed from the accumulation and lithification of sediments, generally lack this layered structure. Additionally, the specific mineral composition and the conditions of formation play a crucial role in whether foliation develops. Consequently, only certain metamorphic environments and rock types will display foliation.
A metamorphic rock that does not appear to be layered?
Quartzite is a common non-layered metamorphic rock formed from sandstone. It is characterized by its hardness and lack of foliation.
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.
What are foliation and banding?
Foliation is a parallel arrangement of mineral grains or structural features in a rock, usually resulting from the application of directed pressure during metamorphism. Banding refers to the visible layers or stripes of different mineral composition or color in a rock, typically formed due to variations in mineral content or processes of deposition. Both foliation and banding provide valuable information about the history and formation of the rock.
Are sedimentary rocks classified tofoliated sedimentary rocks?
No, sedimentary rocks are not classified as foliated. Foliation is a textural feature found in certain types of metamorphic rocks where minerals are aligned in layers or bands due to pressure and heat. Sedimentary rocks are formed by the accumulation and cementation of sediments and do not exhibit foliation.
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.
