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4 February, 17:24

What happen first the intrusion or the extrusion

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  1. 4 February, 17:52
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    Lava that hardens on the surface is called an extrusion. The rock layers below an extrusion are always older than the extrusion ... There, the magma cools and hardens into a mass of igneous rock called an intrusion. An intrusion is always younger than the rock layers around and beneath it.
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