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What are the characteristics of foliated and non-foliated metamorphic rocks?

Answer 1

Foliation is the repetitive layering of rocks due to intense directed pressure. Foliated rocks are characterized by linear streaks that vary in width. Non-foliated metamorphic rocks do not have these streaks.

It occurs among metamorphic rocks that are subjected to intense directed pressure which causes the minerals within the rock to flatten or realign perpendicularly from the area of greatest pressure.

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Answer 2

Isaac Abel

Foliated metamorphic rocks have a layered or banded appearance, resulting from the alignment of mineral grains. Examples include slate, schist, and gneiss. Non-foliated metamorphic rocks lack a layered or banded structure and typically consist of one mineral type. Examples include marble and quartzite.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.