List 4 types of minerals that form uniquely in metamorphics rocks and explain why they do.

Sillimanite, Andalusite, Kyanite and Staurolite

Explanation:

This are the four main minerals that forms in metamorphic rocks and indicates metamorphism.

Sillimanite forms at a high temperature condition, andalusite forms at a moderate temperature and pressure condition, and lastly, kyanite forms at a high pressure condition. Staurolite also forms at high temperature-pressure condition.

This four minerals forms when a rock undergoes metamorphism and are usually found in metamorphic rocks such as schist, gneiss and granulite.

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