A third type of rock is metamorphic rock. Metamorphic rocks began their lives as other rocks. Then, over years and years being buried deep in the ground, time, heat, and pressure changed them into metamorphic rocks.
Examples of metamorphic rock are marble and quartzite.
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A third type of rock is metamorphic rock. Metamorphic rocks began their lives as other rocks. Then, over years and years being buried deep in the ground, time, heat, and pressure changed them into metamorphic rocks.
Examples of metamorphic rock are marble and quartzite.