Metamorphic Rocks

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What are metamorphic rocks?

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Rocks that have been changed from their original form due to heat, pressure, or chemical processes.

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How do metamorphic rocks form?

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Through the processes of heat and pressure.

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What is the main characteristic of metamorphic rocks?

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They have been altered from their original state by heat, pressure, or chemical reactions.

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What is foliation in metamorphic rocks?

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The alignment of mineral grains in parallel layers or bands.

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What is an example of a foliated metamorphic rock?

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Schist or Gneiss.

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What is an example of a non-foliated metamorphic rock?

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Marble or Quartzite.

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What is the difference between foliated and non-foliated metamorphic rocks?

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Foliated rocks have a layered appearance due to the alignment of minerals, while non-foliated rocks do not have this layered structure.

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What role does heat play in the formation of metamorphic rocks?

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Heat can cause minerals to recrystallize, leading to changes in the rock's structure and composition.

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What role does pressure play in the formation of metamorphic rocks?

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Pressure can cause minerals to become denser and can also lead to foliation.

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What is the rock cycle?

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The continuous process of rock formation, breakdown, and reformation, including the transformation of igneous, sedimentary, and metamorphic rocks.