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QAPF Diagram for Volcanic Rocks

 
 

QAPF Diagram for Volcanic Rocks

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QAPF volcanic rock definitions according to the IUGS recommendations for igneous rock classification.

1 Not Defined
2 Alkali-Feldspar Rhyolite
3 Rhyolite
4 Dacite
5 Plagidacite
6 Alkali-Feldspar Trachyte
6* Quartz-Bearing Alkali-Feldspar Trachyte
6' Foid-Bearing Alkali-Feldspar Trachyte
7 Trachyte
7* Quartz-Trachyte
7' Foid-Bearing Trachyte
8 Latite
8* Quartz-Latite
8' Foid-Bearing Latite
9 Andesite
9* Quartz-Bearing Andesite
9' Foid-Bearing Andesite
10 Basalt
10* Quartz-Bearing Basalt
10' Foid-Bearing Basalt
11 Phonolite
12 Tephritic Phonolite
13 Phonolitic Tephrite / Phonolitic Basanite
14 Tephrite / Basanite
15a Phonolitic Foidite
15b Tephritic Foidite
15c Foidite



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Photo added: 5th Jun 2012