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. Pyroxenes (clinopyroxenes) are common accessory minerals. Quartz and …

碱玄岩（英語： Tephrite ）是一种火成岩，具有隐晶质至斑状 质地，矿物通常富含似长石（白榴石或霞石）、斜长石和碱含量较少的长石。 其常见副矿物为 辉石 （单斜辉石），但不存在 石英 和 橄榄石 。

碱玄岩（tephrite）一种含似长石的碱性玄武质岩，不是碱性玄武岩的简称，为SiO2明显不饱和、碱含量很高、含似长石、又含斜长石的玄武质岩石。 若似长石主要为霞石，称霞石碱玄岩，成分为霞石、基性斜长石、含钛辉石和少量橄榄石（<5%)，具有斑状结构 ...

A group of fine grained, mafic igneous rocks, generally extrusive, of basaltic character, primarily composed of calcic plagioclase, augite, and feldspathoid s (typically nepheline), with little or no alkali feldspar or olivine; also, any member of that group; the extrusive equivalent of theralite.

Mineralogical, major and trace element, and isotopic data are presented for leucite basanite and leucite tephrite eruptives and dykes from the Batu Tara volcano, eastern Sunda arc. In general, the eruptives are markedly porphyritic with phenocrysts of clinopyroxene, olivine, leucite ±plagioclase±biotite set in similar groundmass assemblages.

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.

A tephrite is an igneous rock of basaltic character that generally occurs as lava flows, but occasionally as minor intrusions. Its essential constituents are calcic plagioclase and clinopyroxene in association with nepheline, leucite, or analcime.

Tephrite: An alkaline volcanic rock composed of calcic plagioclase, clinopyroxene, and feldspathoid.

Tephrite is a fine-grained, hard rock which is a type of metasomatite, essentially altered basalt. It forms with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks. Along with Tephrite Formation, also learn about Tephrite composition and transformation in the next section.

Tephrite is an type of volcanic (extrusive) rock with low silica content, similar to basalt, but containing foid minerals (e.g. nephelinite, leucite) along with plagioclase. The composition of tephrite is called tephritic. Check if seismic activity worldwide or in …