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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 |