A good example of intrusive igneous rock is granite<span> . Extrusive igneous rocks form when the </span>magma<span> or molten rock pours out onto the earth's surface or erupts at the earth's surface from a volcano . Extrusive rocks are also called volcanic rocks.</span>Basalt<span> , formed from hardened </span>lava<span> , is the most common extrusive rock</span>
