igneous rock « Back to Glossary IndexRocks that are formed from liquid rock, i.e. from volcanic processes. Synonyms: igneous, igneous rocksRelated Articles: Glossary: continental crustGlossary: carbonatiteGlossary: extrusive3 Minerals4 Igneous Processes and Volcanoes« Back to Glossary Index Author: Chris Associate Professor, Salt Lake Community College, Salt Lake City, Utah View all posts by Chris