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Igneous rock - Wikipedia
Igneous rock | Characteristics, Examples, Formation, & Types
Igneous Rocks – Types, Properties, and Examples - Science Notes …
What are igneous rocks? | U.S. Geological Survey - USGS.gov
Igneous Rocks – Definition, Types, Examples, & Pictures - Science …
Igneous Rocks - Geology (U.S. National Park Service)
Igneous Rocks | Pictures of Intrusive and Extrusive Rock Types
Igneous Rocks - Definition, Characteristics, Types, Examples & Uses
Formation, composition, and classification of igneous rock
Igneous Rocks - National Geographic Society