KnowraExtrusive rockLinked fromLinked fromThe 3 pages that link to Extrusive rock, each with the reason it gives.All 3Broader topic 1Compared with 2Volcanic rockBroader topic: It is the principal category that includes volcanic rock.Intrusive rockCompared with: Extrusive rocks cool faster at the surface and usually have finer grains.Igneous intrusionCompared with: Unlike an intrusion, extrusive rock cools at or near the surface.