1001 Space Earth Earth Rocks and Minerals Landscape Sea Weather and Climate Natural Disasters Resources Nature History Human World Science and Technology

Choose a Page:Are all minerals valuable?How do geologists find out about t...How do geologists study minerals?How hard are minerals?Why do some rocks form in layers?Why do minerals form shapes?How are igneous rocks made?How are metamorphic rocks made?What are fossils?*What is hard rock geology?*How do geologists date rocks?What is soft rock geology?What are gems?What is a mineral? What is hard rock geology? Hard rock geology is the study of igneous and metamorphic rocks. Igneous rocks, like granite, are formed from the magma in the Earth's mantle. Metamorphic, or 'changed' rocks, like marble, are formed when other rocks have been subjected to heat or pressure. A rock   Previous: Back Book: 1001 Section: Earth Chapter: Rocks and Minerals