Explain how extrusive rocks are formed.
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Extrusive rocks are formed on the surface of the Earth from lava, which is magma that has emerged from underground. When lava comes out of a volcano and solidifies into extrusive igneous rock, also called volcanic, the rock cools very quickly.
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1
Answer:
Extrusive rocks are formed on the surface of the Earth from lava, which is magma that has emerged from underground. ... When lava comes out of a volcano and solidifies into extrusive igneous rock, also called volcanic, the rock cools very quickly.
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