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The following shows the rock names and their relative position along the composition chart. The rocks above the chart are the intrusive rocks, and those below are the extrusive rocks. |
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Granite
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Granodiorite
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Diorite
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Gabbro
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Peridotite
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 Intrusive |
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 Extrusive |
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Rhyolite
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Dacite
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Andesite
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Basalt
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This following table shows some of the more general characteristics associated with the compositions above. |
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Felsic
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Intermediate
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Mafic
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More Polymerized
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Less polymerized
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Lighter Color
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Darker Color
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Porphyry: Mixture of large and small grains (texture not a composition) |
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If Chemistry: Rhyolite |
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Rhyolitic porphyry |
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If Chemistry: Andesite |
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Andesitic porphyry |
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