* Foliated (banded) - minerals oriented along visible planes * Example: Schist (fine grain) (from slate) * Example: Gneiss (coarse grain) (from a variety of rock, one of which is granite) * Non-foliated (no banding) usually rock of one mineral) * Example: Quartzite (from sandstone - quartz) * Example: Marble (from limestone - calcium carbonate
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Nonfoliated refers to a type of metamorphic rock that does not have a banded or layered appearance. These rocks have a more uniform texture and lack the parallel alignment of mineral grains typically seen in foliated rocks. Examples of nonfoliated rocks include quartzite and marble.
Quartzite
False. The terms folidated and nonfoliated apply to metamorphic rocks.
Lack of banding
Quartzite is a nonfoliated metamorphic rock that is granular and composed mainly of quartz. It forms from the metamorphism of quartz-rich sandstone.
Nonfoliated metamorphic rocks are formed around igneous intrusions where the temperatures are high but the pressures are relatively low and equal in all directions (confining pressure).