Foliated metamorphic rocks such as gneiss display banding and regrouping of its mineral constituents as a result of enormous pressures. The banding forms perpendicularly to the direction of pressure. The pressure is usually related to tectonic plate collisions. Schist is another type of foliated rock that exhibits thin layering of micaceous minerals, once again due to pressure. The difference between these two types of foliated rock lies in the amount of pressure which they were exposed to.
Gneiss
No banding or alignment of a metamorphic rock's minerals would be consider non-foliated.
sedimentary rocks
Yes, the other type is a foliate rock with bands of minerals.
Metamorphic rock displaying banding is referred to as foliated metamorphic rock.
gneiss
Gneiss
A rock that exhibits a non layered structure
fold
The type of metamorphic rock would be classified as a nonfoliated metamorphic rock, like quartzite and marble.
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