No, plutonic does not mean intrusive. However, in geology a
pluton is a body of intrusive igneous rock, that has crystallized
on the Earths surface.
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Granite is a light-coloured plutonic rock.
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The most common plutonic igneous rock is granite. There are
various types of granite based on whether the rock cooled above or
below the surface of the earth. The major differences among these
types of granitic rock is their crystalline structure.