igneous

One of the three major rock types, igneous rock is created through the solidification of magmatic material. This magma comes from the melting of preexisting rock in the crust or the mantle. Intrusive igneous processes create coarse grained rock bodies from the slow cooling of magma deep within the Earth’s surface, while extrusive igneous processes result in fine grained, glassy rock. Earth’s oceanic crust is made up of igneous rock. A few igneous geological features include laccoliths, sills, dykes, and batholiths. Pikes Peak, an exposed batholith, is composed of the characteristically pink Pikes Peak granite.