Tephriphonolite

Tephriphonolite is a mafic to intermediate extrusive igneous rock in composition between phonotephrite and phonolite.^[1] It contains 9 to 14% alkali content and 48 to 57% silica content (see TAS diagram).^[2]

References

↑ "Unusual Lava Types". Strongly Alkaline Lavas. San Diego State University. Retrieved 2016-09-11.
↑ Bailey, Roy A. (2004). "Eruptive History and Chemical Evolution of the Precaldera and Postcaldera Basalt-Dacite Sequences, Long Valley, California: Implications for Magma Sources, Current Seismic Unrest, and Future Volcanism". United States Geological Survey: 17.

Volcanoes

Volcano types	Caldera Cinder cone Complex volcano Cryovolcano Fissure vent Lava cone Lava dome Maar Mud volcano Parasitic cone Pyroclastic cone Pyroclastic shield Rootless cone Shield volcano Somma volcano Stratovolcano Subglacial volcano Submarine volcano Supervolcano Volcanic cone Volcanic field (polygenetic · monogenetic)

Volcanic rocks	Volcanic rock Agglomerate Andesite Basalt Basaltic andesite Benmoreite Blairmorite Dacite Felsite Komatiite Latite Leucitite Nephelinite Obsidian Phonolite Phonotephrite Rhyodacite Rhyolite Tephriphonolite Trachyte Trachyandesite Trachybasalt Tuff

List and volcanoes groups	Lists of volcanoes Decade Volcanoes Volcanic belt

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