Metamorphic rocks

Metamorphic rocks have been subjected to tremendous heat and/or pressure, causing them to change into another type of rock.

They are usually resistant to weathering and erosion and are therefore very hard-wearing.

Examples of metamorphic rocks include marble, which originates from limestone and slate, which originates from clay.

Photograph of slate and marble

Slate and marble

Characteristics of metamorphic rocks

  • These are formed when either igneous or sedimentary rocks are changed.
  • Heat and/or pressure will cause the elements in the original rock to react and re-form.
  • Metamorphic rocks are highly resistant to erosion and are often used in building materials.
Photograph of Marble Caves of Lake General Carrera, Chile

Marble Caves of Lake General Carrera, Chile

Photograph of Llanberis Slate Quarry, Wales

Llanberis Slate Quarry, Wales

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