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Explain why some types of magma form igneous rocks that are dark colored and dense?

Jessie Thompson

in Social studies

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Donald Ward on April 8, 2018

They are rich in iron and magnesium and poor in silica. Why do some types of magma form igneous rocks that are dark colored and dense? Intrusive are trapped under the earth. Extrusive rocks are foremd when the lava cools on the surface of the Earth.


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