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Q: Why don't all rocks have foliation?
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Do all metamorphic rocks have layers?

No. The layering or foliation only occurs when there is a variation in the composition of the original rock. If the rock is homogeneous, then there will be no foliation.


Do all metamorphic rocks show foliation?

No. Non-foliated metamorphic rocks include quartzite and marble.


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 is nonfoliated texture?

Metamorphic rocks that do not exhibit foliation.


What major group does foliated rocks belong?

Foliation is a characteristic of some metamorphic rocks.


How do foliated rocks break?

Usually along the plane of foliation.


Where do foiliated rocks form?

Foliation occurs deep underground.


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.


Flat or wavy parallel bands of minerals within rocks?

foliation


What is it called when minerals or grains can be forced under stress to line up in a nonrandom orientation?

This process is called foliation. It occurs in rocks under differential stress, causing minerals or grains to align in a preferred orientation, creating a layered or banded appearance. Foliation is a key characteristic of metamorphic rocks.


Is andesite a foliated rock?

No. Foliation is a term that applies to metamorphic rocks. Andesite is igneous.


What describes the thin flat layering in most metamorphic rocks?

The thin flat layering found in most metamorphic rocks is called foliation