Do Extrusive Rocks Have Large Crystals?
Do Extrusive Rocks Have Large Crystals? Do extrusive rocks have large crystals? Intrusive igneous rocks cool from magma slowly in the crust. They have large crystals. Extrusive igneous rocks cool from lava rapidly at the surface. They have small crystals. Which crystals are bigger intrusive or extrusive? The most obvious difference between extrusive rocks and