Hey you yes you here's some information about, What is the difference between the formation and characteristics of intrusive igneous rock and extrusive igneous rock?
The major visible difference between the two are crystal size, intrusive rocks have a larger crystal/grain texture due to the slow cooling of magma below the earth surface which encourages the growth of larger crystals, while extrusive rocks, because of the rapid cooling at/above the earth's surface does the opposite.
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