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ES Ch 3.2
Igneous Rocks
Term | Definition |
---|---|
andesitic composition | Igneous rocks with a composition between granitic and basaltic rocks |
basaltic composition | Igneous rocks containing substantial dark silicate minerals and calcium-rich feldspar |
extrusive igneous rock | Igneous rocks formed on Earth's surface |
granitic composition | Igneous rocks made of light-colored silicates |
intrusive igneous rock | Igneous rocks formed below Earth's surface |
porphyritic texture | Igneous rocks with large crystals embedded in matrix of smaller crystals |
ultramafic | Igenous rock mainly formed from iron and magnieusm-rich minerals |