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Chapter 5

TermDefinition
lava magma that flows out onto Earth's surface
igneous rock form when lava or magma cools and minerals crystalize
partial melting the process whereby some minerals melt at relatively low temperatures while other minerals remain solid
Bowen's reaction series sequential, predictable, dual-branched pattern in which minerals crystallize from cooling magma
fractional crystallization process in which different minerals crstallize from magma at different temperatures, removing elements from magma
Intrusive Rock coarse-grained igneous rock that is formed when molten rock cools slowly and solidifies inside Earth's 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 magnetsium; 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 distributionof 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-looking rock; lava whose gas bubbles do not escape
Pegmatite vein deposites of extremely large-grained minerals that can contain rare ores such as lithium and beryllium
Kimberlite rare, unltramatic rock that can contain diamonds and other minerals formed only under very high pressures
Created by: spjaco
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