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Granite is an intrusive felsic igneous rock. It is high in silica, potassium, aluminum, and sodium. It forms when magma cools slowly underground. Komatiite is an extrusive ultramafic igneous rock. It is poor in silica and rich in iron and magnesium. It forms when lava cools on Earth's surface. Earth's interior is no longer hot enough to produce komatiite lava.

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Q: What is the difference between Granite and Komatiite?
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