Hornblende andesite porphyry
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Hornblende andesite porphyry is an intermediate volcanic igneous rock. Like most porphyrys, it cooled at two separate rates, causing two sizes of crystals to be visible.
Source: [1]
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- This page was last modified 22:46, 19 November 2007 by Wikipedia user CmdrObot. Based on work by Wikipedia user(s) Julius Sahara and Gameboybunny.
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