| 11. | These consist of alkali-feldspar porphyritic quartz-trachyte and trachyte.
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| 12. | Rocks are porphyritic and contain hornblende as well as biotite or pyroxene.
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| 13. | Rock samples taken from Llullaillaco are mostly porphyritic or matrix.
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| 14. | The surface texture of the rocks is trachytic to porphyritic.
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| 15. | They are very commonly porphyritic, petrologically indistinguishable from lavas of similar composition.
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| 16. | The main type of igneous rock is porphyritic diorite.
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| 17. | Crystalline textures include phaneritic, foliated, and porphyritic.
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| 18. | They range from porphyritic alkaline rhyolite to alkaline aplite to porphyritic alkaline granite.
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| 19. | They range from porphyritic alkaline rhyolite to alkaline aplite to porphyritic alkaline granite.
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| 20. | Textures range from porphyritic to mantle-derived magma.
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