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Igneous Rocks

Minerals and Rockas Part 2

TermDefinition
Igneous Rocks Rock type that form when molten material solidifies
Environment of Formation The location where liquid rock solidifies into solid rock
Magma Molten rock that is inside the earth
Plutonic Rock that formed deep within the earth
Intrusive Below earths crust
Lava Molten rock that is outside of the earth
Volcanic Rock that formed on the earths surface
Extrusive Above earths crust
Color For igneous rocks color is broken down into two categories of light and dark
Composition A mixture that make up an igneous rock
Felsic Light colored rocks that have a high aluminum (Al) content an silicon (Al)
Mafic Dark colored rocks that have a high iron (Fe) or magnesium (Mg) content
Texture The appearance or characteristic of a rock
Vescular Texture that consists of gas pockets that give the appearance of having holes
Prophyritic Texture that contains large crystals in a fine grained mixture
Crystal Size Refers to an actual measurement of the individual crystals or aggregate
Course or very The longer the cooling time the longer the crystal size
Glassy or fine The shorter the cooling time the smaller the crystal size
Created by: cmbinder197