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What two things are necessary for foliation to form in a metamorphic rock?
Mosspl
presence of platy mineral and orientation stress can give foliation to a metamorphic rocks.
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∙ 14y ago
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What is a metamophic rock?
a metamorphic rock is a rock that is formed from heat and pressure it can form from a sedimentary or igneous an example of a metamorphic rock is marble metamorphic rocks can have foliation like banding or layers.
Is a migmatite foliated or non foliated metamorphic rock?
Difficult to give you a precise answer, migmatites are composed of a leucosome which is new material crystallized from incipient melting and a mesosome which is old material that resisted melting. These two materials may form a fine fabric which imparts a foliation to the rock. The leucosome may also be incoherently folded. Also if the migmatite is forming from a foliated source, the foliation may persist. Thus migmatites are metamorphic rocks that show characteristics of incipient melting and they may or may not show a foliation too, the foliation is not a critical characteristic of a rock being a migmatite.
What are the 2 things to form a metamorphic rock?
It is formed by the action of heat or pressure.
Is gneiss nonfoliated?
No. Gneiss has foliation in the form of alternating light and dark bands.
Why doesn't quartzite exhibit foliation?
To exhibit a foliation one needs the presence of at least two mineral types to form the foliation layering. As quartzite is a single mineral rock, it will remain massive even in environments where the adjacent rock types have become foliated.
What is a metamophic rock?
a metamorphic rock is a rock that is formed from heat and pressure it can form from a sedimentary or igneous an example of a metamorphic rock is marble metamorphic rocks can have foliation like banding or layers.
What are the main things that cause metamorphic rocks to form?
the main things that cause metamorphic rocks to form is heat, pressure and chemical fluids.
Is a migmatite foliated or non foliated metamorphic rock?
Difficult to give you a precise answer, migmatites are composed of a leucosome which is new material crystallized from incipient melting and a mesosome which is old material that resisted melting. These two materials may form a fine fabric which imparts a foliation to the rock. The leucosome may also be incoherently folded. Also if the migmatite is forming from a foliated source, the foliation may persist. Thus migmatites are metamorphic rocks that show characteristics of incipient melting and they may or may not show a foliation too, the foliation is not a critical characteristic of a rock being a migmatite.
What things have to increase from metamorphic rocks for it to form?
Temperature and Pressure.
What are the main things that cause rocks to form?
the main things that cause metamorphic rocks to form is heat, pressure and chemical fluids.
What are the 2 things to form a metamorphic rock?
It is formed by the action of heat or pressure.
What counditions are necessary in order for metamorphic rock to form?
solid rock must be squeezed and heated to high temperatures.
Where do foiliated rocks form?
Foliation occurs deep underground.
What do bands in a metamorphic rock mean?
The thicker the bands the more intense the heat and pressure conditions were to form the rock. Metamorphic rocks are transformed existing rock types. Thicker bands in the appearance of a metamorphic rock mean that it was made with more intense heat and under greater amounts of pressure.
Is gneiss nonfoliated?
No. Gneiss has foliation in the form of alternating light and dark bands.
Can metamorphic rock form out of other metamorphic rock?
No.
What 2 things are applied to igneous or sedimentary rocks that make metamorphic rocks form?
Heat and pressure!!
