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What is the difference between an intrusion and extrusion?
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What is the difference between an intrusion and extrusion?

User Jcaliz
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Extrusive rocks are formed on the surface of the Earth from lava, which is magma that has emerged from underground. Intrusive rocks are formed from magma that cools and solidifies within the crust of the planet
User Ergin
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An intrusion is any body of intrusive igneous rock, formed from magma that cools and solidifies within the crust of the planet. In contrast, an extrusion consists of extrusive rock, formed above the surface of the crust.
User Intensivist
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