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Igneous Rocks
Bonnie Branch 6th Grade - 3-2 / Igneous Rocks
Term | Definition |
---|---|
extrusive rock | Igneous rock formed from lava that erupted onto Earth's surface. |
intrusive rock | Igneous rock that formed when magma hardened beneath Earth’s surface. |
basalt | A dark, dense, igneous rock with a fine texture, found in oceanic crust (most common extrusive rock). |
granite | A usually light-colored rock that is found in continental crust (most common intrusive rock). |
porphyritic texture | Intrusive rocks that have large crystals scattered on a background of much smaller crystals. |