Editing Tephrite

{{Short description|Igneous, volcanic rock}}
{{distinguish|tephroite}}

{{Refimprove|date=December 2009}}
[[Image:Mayener Basaltlava.jpg|right|thumb|[[Leucite]] tephrite from Mayen, [[Eifel]], Germany]]
'''Tephrite''' is an [[igneous rock|igneous]], [[volcanic]] ([[extrusive]]) [[rock (geology)|rock]],  with [[aphanitic]] to [[porphyritic]] [[Texture (crystalline)|texture]]. [[Mineral]] content is usually abundant [[feldspathoid]]s ([[leucite]] or [[nepheline]]), [[plagioclase]], and lesser alkali [[feldspar]]. [[Pyroxene]]s (clinopyroxenes) are common accessory minerals. [[Quartz]] and [[olivine]] are absent. The absence of olivine distinguishes them from the otherwise similar [[basanite]]. It's 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 [[intrusion]]s in [[Namibia]].

==References==
{{Reflist}}
{{Rock type}}

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{{Igneous-rock-stub}}

[[Category:Volcanic rocks]]