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21 August, 16:41

What is the difference between an intrusion and extrusion?

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  1. 21 August, 18:16
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    Intrusions are magmas that intrude into a preexisting rock.

    Extrusion are lavas that extrude onto the surface of a preexisting rock (i. e. the surface of the Earth, whether it is on dry land or under water).
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