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Biology 13 Online
OpenStudy (anonymous):

Which type of rock does magma form when it hardens?

OpenStudy (anonymous):

Magma that reaches the surface of the earth is called lava. When it cools and hardens, it too forms igneous rock. Igneous rock that is formed on the earth's surface is described as extrusive.

OpenStudy (anonymous):

Thanks

OpenStudy (anonymous):

can you help me on mne?

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