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Ch. 5 voc.
Term | Definition |
---|---|
lava | magma that flows out onto Earth's surface |
igneous rock | form when lava or magma cools and minerals crystallize |
partial melting | some minerals melt at relatively low temperatures while other minerals remain solid |
Bowen's reaction | as magma cools and crystallizes, minerals form in predictable patterns |
fractional crystallization | similar to partial melting in that the composition of magma can change |
intrusive rock | magma cools and crystallizes below Earth's surface |
extrusive rock | magma cools and crystallizes on Earth's surface |
basaltic rock | dark colored |
granitic rock | light colored |
texture | size, shape, and distribution of the crystals |
porphyritic texture | characterized by large, well-formed crystals surrounded by finger-grained crystals |
vesicular texture | spongy appearance |
pegmatite | large-grained minerals |
kimberlite | ultrabasic rocks |