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Metamorphic because they use different minerals to form

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Paige Snellgrove

Lvl 2
2y ago
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Wiki User

11y ago

I think metamorphic because they are made from all other types of rock.

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Wiki User

10y ago

If this is an actual question from a test, then D. Interlocking 0.5 centimeter diameter crystals of various colors. If it's just a general answer, then an igneous rock with cooled crystals. \

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Wiki User

9y ago

Sedementary rock takes the longest to form.

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Q: What type of rock takes the longest to form?
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What type of igneous rock takes the longest time to cool?

The type of igneous rock that takes the longest time to cool is metamorphic. This is mainly due to the fact that they made from a combination of all the other rocks.


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