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Related to trachyte: phonolite


 (trā′kīt′, trăk′īt′)
A light-colored igneous rock consisting essentially of alkali feldspar.

[French, from Greek trākhus, rough.]

tra·chyt′ic (trə-kĭt′ĭk) adj.


(ˈtreɪkaɪt; ˈtræ-)
(Geological Science) a light-coloured fine-grained volcanic rock of rough texture consisting of feldspars with small amounts of pyroxene or amphibole
[C19: from French, from Greek trakhutēs, from trakhus rough]
trachytoid adj


(ˈtreɪ kaɪt, ˈtræk aɪt)

a fine-grained volcanic rock consisting essentially of alkali feldspar and one or more subordinate minerals, as hornblende or mica: the extrusive equivalent of syenite.
[1815–25; < French < Greek trāchýtēs roughness =trāchý(s) rough + -tēs n. suffix]
tra•chyt•ic (trəˈkɪt ɪk) trach•y•toid (ˈtræk ɪˌtɔɪd, ˈtreɪ kɪ-) adj.
References in classic literature ?
To the conglomerate and trachyte succeeded black basalt, the first dispread in layers full of bubbles, the latter forming regular prisms, placed like a colonnade supporting the spring of the immense vault, an admirable specimen of natural architecture.
The lithic tools are made from volcanic rocks (obsidian, basalt, lava, trachyte, tuff).
Phenocryst-poor latite and trachyte are interpreted as the result of mineral separation, and phenocryst-rich tephrite porphyry and olivine diabase porphyry are the result of phenocryst accumulations in the magma chamber.
The mineralization is hosted in potassic and quartz altered monzonite intrusive and trachyte sub-volcanic units.
The area staked contains intrusive breccia bodies that invade host trachyte, phonolite, and Precambrian granite.
230]Th, differentiation of alkali basalt to form trachyte in deep magma chambers (e.
The trachyte porphyries occur as irregular masses to tabular or sheet-like bodies.
WF98-34 was drilled approximately 60 metre down-dip from WF98-33 and intersected two narrow mineralized zones; the lowermost zone is truncated by a trachyte sill.
We ll also be building a multi-use trail from Beerburrum township to the Trachyte Circuit in the Mt Tibrogargan Section, to be called the Soldier-Settlers Track.
Thus, the Cameroon volcanic axis, comprising deposits such as basalt, trachyte and rhyolite, uncomformably overlies the Mamfe Formation (Fitton, 1980).
Granite, basalt, andesite and trachyte are used as coating materials for buildings.
Murazliev's lawyer Vika Kargabaeva reported that at the time of arrest he had been treated with a diagnosis of acute pharyngitis and trachyte.