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chap five vocab
Term | Definition |
---|---|
lava | magma that flows out onto earths surface |
igneous rock | intrusive or extrusive rock formed from the cooling and crystallization of magma or lava. |
partial melting | process in which different minerals melt into magma at different temperature changing its compositions |
bowens reaction series | sequential predictable dual branched pattern in which minerals crystallized from cooling magma |
fractional crystallization | process in which different minerals crystallize from magma at different temps removing elements from magma |
intrusive rock | coarse gained igneous rock that is formed when molten rock cools slowly and solidifies inside earths crust |
extrusive rock | fined gained igneous rock that is formed when molten rocks cools quickly and solidifies on earths 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 |
vesicular texture | a spongy looking rock lave whose gas bubbles do not escape |
pegmatite | vein deposits of extremely large grained minerals that can contained rare ores such as lithium and beryllium. |
kimberlite | rare ultramafic rock that can contain diamond and other minerals formed only under very high pressure |