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ES Ch 3.2

Igneous Rocks

TermDefinition
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
Created by: Mrs.Stichter
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