{{Short description|Igneous, volcanic rock}} {{distinguish|tephroite}} {{More references|date=January 2026}} [[Image:Mayener Basaltlava.jpg|right|thumb|Leucite tephrite from Mayen, Eifel, Germany]] '''Tephrite''' is an igneous, volcanic (extrusive) rock, with aphanitic to porphyritic texture. Mineral content is usually abundant feldspathoids (leucite or nepheline), plagioclase, and lesser alkali feldspar.<ref>{{cite web |title=Geology Dictionary: Tephrite |url=https://www.volcanodiscovery.com/geology/glossary/tephrite.html |website=Volcano Discovery |access-date=21 April 2026}}</ref> Pyroxenes (clinopyroxenes) are common accessory minerals. Quartz and olivine are absent. The absence of olivine distinguishes them from the otherwise similar basanite. Its parameters are defined in the QAPF diagram. Occurrences include leucite nepheline tephrite from Hamberg bei Neckarelz near Heidelberg, Germany,<ref>{{cite journal|author=Frenzel, Gerhard |year=1953|title=Die Erzparagenese des Katzenbuckels im Odenwald|journal=Contributions to Mineralogy and Petrology|volume=3|number=6|pages=409-444|doi=10.1007/BF01129196|language=de}}. Retrieved 2012-04-11.</ref> phonolite-tephrite at Monte Vulture, Basilicata, Italy and basanite–tephrite intrusions in Namibia.
==References== {{Reflist}} {{Rock type}}
{{Volcanology-stub}} {{Igneous-rock-stub}}
Category:Volcanic rocks