Identification of Igneous Rock
You have identified Andesite.
Andesite is an intermediate igneous rock with an aphanitic texture. It contains between 58 and 63% by mass of silica (SiO2) and is erupted at temperatures between 900-1100 degrees celsius.
Texture |
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Felsic |
Intermediate |
Mafic |
Ultramafic |
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Pegmatitic |
Granite-pegmatite |
Diorite-pegmatite |
Gabbro-pegmatite |
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Phaneritic |
Granite |
Diorite |
Gabbro |
Rarely seen (Komatiite) |
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Aphanitic |
Rhyolite |
Andesite |
Basalt |
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Porphyritic |
Porphyritic Rhyolite |
Porphyritic Andesite |
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Glassy |
Obsidian |
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Vesicular |
Pumice |
Scoria |
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Pyroclastic |
Tuff |
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