tephrite


Also found in: Encyclopedia, Wikipedia.
Related to tephrite: phonolite, trachyte

tephrite

(ˈtɛfraɪt)
n
(Geological Science) a variety of basalt containing plagioclase, augite, and a feldspathoid, commonly nepheline, or leucite
[C17: from Greek tephros, from tephra ashes; see -ite1]
tephritic adj
Translations
téphrite
References in periodicals archive ?
Among similar localities in the vicinity, the zeolite locality of Pusty vrch (Schie-chenberg) near Folknafe is characterized by the presence of thomsonite, chabazite, phillipsite and gismondine occurring in amygdales of a lava flow of "leucite" tephrite composition (Tucek 1962).
The Capitan dike swarm in southwestern Lincoln County, New Mexico, contains six different rock types ranging from tephrite to rhyolite.
In tephrite and trachybasalt the phenocryst of plagioclase, augite, olivine, pargasite and phlogopite are embedded in the groundmass of plagioclase, Ti-augite, pargasite, phlogopite, apatite, opaque minerals (ilmenite) and devitrified glass (Sawada et al.
According to the CIPW norm, the samples are plagioclase-, orthoclase-, apatite- and hypersthene-normative; most of them are also quartz-normative except for the tephrites which are olivine-normative.
The shape of "Ammonis cornu imitates a horn"; asbestos and silver, "hair"; the motley crystals of igneous tephrites "a new moon.
The volcanics are mainly basanites and tephrites, mildly to strongly alkaline, and akin to the intra-plate volcanic rock series.
Basaltoid rocks are represented here by predominant tephrites and basanites, rare foidites, and singular basalts and trachybasalts (Bolewski and Parachoniak, 1982; Kozlowska-Koch, 1987; Wierzcholowski, 1993; Lorenc et al.
tephrites and foidites) prevailing over the olivine ones.