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Chapter 5 vocab ES
Term | Definition |
---|---|
Intrusive rock | coarse - grained igneous rock that if formed when molten rock cools slowly and solidifies inside Earths crust. |
extrusive rock | fine grained igneous rock that is formed when molten rock cools quickly and solidifies on Earth's surface. |
basaltic rock | rock that is dark colored has lower silica contents and is rich in iron and magnesium contains mostly plagioclase and pyroxene. |
granitic rock | light colored rock that has high silica content and contains quartz and potassium feldspar. |
texture | the size shape and distribution of the crystals or grains that make up a rock |
porphyritic texture | rock texture characterized by large well formed crystals surrounded by finer grained crystals of the same or different mineral. |
vesicular texture | a spongy like rock lava whose gas bubbles do not escape. |
pegmatite | vein deposits of extremely large grained minerals that can contain rare ores such as lithium and beryllium. |
kimberlite | rare ultramafic rock that can contain diamonds and other minerals formed only under very high pressure. |
lava | magma that flows out onto the Earth's surface. |
igneous rock | intrusive or extrusive rock formed form the cooling and crystallization of magma or lava. |
partial melting | process in which different minerals melt into magma at different temperatures changing its composition. |
Bowen's reaction series | sequential predicable dual branched pattern in which minerals crystallize from cooling magma. |
fractional crystallization | process in which different minerals crystallize from different temperatures removing element form magma. |