Asked by dom

which type of rock is foliated

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Answered by GPT-5 mini AI
Foliated rocks are metamorphic rocks. Foliation is a layered or banded texture produced when directed pressure and high temperature realign platy or elongated minerals during metamorphism.

Common foliated metamorphic rocks:
- Slate (fine foliation/slaty cleavage)
- Phyllite (fine-grained, sheen)
- Schist (coarser foliation, visible mica flakes)
- Gneiss (distinct light/dark mineral banding)

By contrast, some metamorphic rocks (e.g., marble, quartzite) are non-foliated.