| 21. | These volcanoes form part of the Central Volcanic Zone, a north-south trending volcanic arc.
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| 22. | The Central Volcanic Zone is one of four different volcanic arcs in the Andes.
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| 23. | Volcanic arcs do not generally exhibit such a simple age-pattern.
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| 24. | The islands are part of the Luzon Volcanic Arc.
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| 25. | The subducting plate has not reached a depth sufficient for proper volcanic arc volcanism, however.
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| 26. | Geologically the archipelago is defined as a volcanic arc.
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| 27. | Atitl�n is part of the Central American Volcanic Arc.
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| 28. | The volcanic arc forms when the subducting plate reaches a depth of about 100 km.
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| 29. | Lascar is located in the main volcanic arc, on the western margin of the Altiplano.
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| 30. | Bazman volcano is part of a volcanic arc in southeastern Iran, the Makran volcanic arc.
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