| 11. | Phonolite is the fine-grained extrusive equivalent.
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| 12. | Units within the complex include carbonatite, nepheline syenite, phonolite, and ijolite.
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| 13. | A few geological processes and tectonic events can melt the necessary precursor rocks to form phonolite.
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| 14. | Phonolite covers most of its surface.
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| 15. | The majority of the basalt and phonolite cones sit directly on the sandstones of the Middle Bunter.
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| 16. | During the Tertiary volcanic magma streams broke through the sandstone layer and solidified into basalt and phonolite.
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| 17. | Faujasite occurs in vesicles within basalt and phonolite lava and tuff as an alteration or authigenic mineral.
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| 18. | Mont Gerbier de Jonc was formed 8 million years ago when a volcano erupted molten phonolite lava.
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| 19. | The Heldburger Castle Hill is also made of basaltic rock that phonolite ( Sparkling Stone ) is called.
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| 20. | The dikes or sills consist either of phonolite, tinguaite, lamprophyre micromalignite, lamprophyre micromelteigite, or carbonatite.
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