Tefrita: diferència entre les revisions

{{confusió|Tefroïta}}

{{Infotaula de roca}}

'''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. Occurrences include leucite nepheline tephrite from Hamberg bei Neckarelz near [[Heidelberg]], [[Germany]],<ref>Frenzel, Gerhard (1953) ''Die Erzparagenese des Katzenbuckels im Odenwald'', Contributions to Mineralogy and Petrology, Volume 3, Number 6, pages 409-444, DOI: 10.1007/BF01129196 {{de icon}}. Retrieved 2012-04-11.</ref> [[phonolite]]-tephrite at [[Monte Vulture]], Basilicata, [[Italy]] and [[basanite]]–tephrite [[intrusion]]s in [[Namibia]].