Metamorphic Rock

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What is a metamorphic rock?

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A type of rock that has been changed from its original form due to heat, pressure, or chemically active fluids.

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How are metamorphic rocks formed?

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Metamorphic rocks are formed through the processes of heat and pressure acting on existing rocks.

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What is quartzite?

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A hard metamorphic rock formed from the metamorphism of sandstone, primarily composed of quartz.

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What is slate?

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A fine-grained metamorphic rock that originates from shale, characterized by its ability to split into thin sheets.

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What is gneiss?

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A metamorphic rock with a banded or foliated appearance, formed from the alteration of granite or sedimentary rocks.

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What does foliation mean in metamorphic rocks?

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Foliation refers to the repetitive layering in metamorphic rocks, often caused by the alignment of mineral grains under pressure.

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What is the difference between regional and contact metamorphism?

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Regional metamorphism occurs over large areas under high pressure and temperature, while contact metamorphism occurs when rocks are heated by nearby molten magma.

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What is the role of heat in metamorphism?

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Heat increases the energy of the minerals in the rock, causing them to recrystallize and change their structure.

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What is the role of pressure in metamorphism?

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Pressure can cause minerals to become denser and can lead to the formation of foliation in metamorphic rocks.

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What is a parent rock?

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The original rock from which a metamorphic rock forms; for example, shale is the parent rock of slate.