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An introduction to geology
An introduction to geology

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1.1.3 Metamorphic rocks

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Figure 1.3 Metamorphic rocks

Metamorphic rocks are formed when other rocks, usually buried deep inside the Earth, are exposed to heat and pressure, but NOT melted (as then they’d be igneous). Metamorphic rocks can be formed from sedimentary rocks, igneous rocks, or even other metamorphic rocks.

In the next section, you’ll be asked which of these types of rocks concrete resembles.