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Metamorphic Rock

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Metamorphic Rock

  • Rock that has changed its form
  • Change is caused by heat and pressure
  • Changes can occur in the rock’s:

- appearance

- texture

- crystal structure

- mineral content

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Types of Metamorphic Rock

Types are classified according to the arrangement of the grains

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Types of Metamorphic Rock

  • Foliated – contain layers or bands
      • Rocks split along bands

Granite

changes to

Gneiss

Shale

changes to

Slate

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Types of Metamorphic Rock

  • Nonfoliated – mineral grains are random
    • rocks do not split along bands

Sandstone

changes to

Quartzite

Limestone

changes to

Marble

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Uses

  • Marble and Slate are the most useful
      • Buildings
      • Statues
      • Walkways
      • blackboards

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