7For most of us, igneous rocks are no more than a stoneХs throw away. These underrated rocks make up more than half of EarthХs crust Not only that, but they have many uses in building, medicine, and other industries. This title dives deep into the properties, types, formation, and uses of igneous rocks. Special features designed to visually engage readers such as a profile, an activity, formation diagrams, and a rock cycle chart, complete this fact-filled read.