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Definition
| igneous rock formed by cooling and crystallization of magma at the earth's surface |
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| igneous rock formed by cooling and crystallization of magma at great depth beneath the earth's surface |
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| classification of the igneous rocks |
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| based on chemical and mineral composition, grain size |
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Definition
| controlled by rate of cooling of the magma, and viscosity of the magma |
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Definition
| cooling is too rapid for ions to group into crystals |
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Definition
| glass of felsic composition |
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Definition
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Definition
| an igneous rock in which large crystals are enclosed in a matrix of much finer grained minerals |
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Definition
| biotite, amphibole, pyroxene, olivine |
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Term
| distribution of igneous rocks in the earth's crust |
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Definition
| -rock formed from magma of granitic composition is confined to the continental crust |
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