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Chapter 5

TermDefinition
Lava Is magma that flows out onto Earths surface.
Igneous rocks Form when lava or magma cools and minerals crysallize.
partial melting Minerals melt at relatively low temperatures while other minerals remain solid.
Bowen's reaction series Magma cools and crystallizes, minerals form in predictable patterns.
Fractional Crystallization Similar to partial melting in that the compositions of magma can change.
Intrusive rock Generally large enough to see without magnification.
Extrusive rock Small and difficult to see without magnification.
Basaltic rock Gabbro, dark-colored, have lower silica contents, and contain mostly plagioclase and pyroxene.
Granitic rock Granite, are light colored, have high silica contents, and contian mostly quartz, potassium feldspar.
Texture Refers to the size,shape, and distribution of the crytals or grains that make up a rock.
Porphyritic texture Large, well formed crystals surrounded by finer grained crystals of the same mineral.
Vesicular texture Spongy apperance.
Pegmatites Ores of rare elements, such as lithium and beryllium.
Kimberlites Diamond is found in this rock.
Created by: BriannaBrooks
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