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Four
types of textures:
Phaneritic, Porphyritic, Apanitic (microcrystalline), and Aphanitic
(glassy).
Samples include:
biotite granite, granite, syenite, diorite, gabbro, anorthosite,
horneblende basalt porphyry, trachyte porphyry, felsite, andesite,
basalt, obsidian, pitchstone, pumice, and scoria
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