tra·chyte (tr  k t , tr kt)n. A light-colored igneous rock consisting essentially of alkali feldspar. [French, from Greek tr khus, rough.]tra·chyt ic (tr -k tk) adj. |
trachyte [ˈtreɪkaɪt ˈtræ-]
n
(Earth Sciences / Geological Science) a light-coloured fine-grained volcanic rock of rough texture consisting of feldspars with small amounts of pyroxene or amphibole
[from French, from Greek trakhutēs, from trakhus rough]
trachytoid [ˈtrækɪˌtɔɪd ˈtreɪ-] adj
| trachyte (trkt, trkt) A light-colored, fine-grained igneous rock consisting primarily of alkali feldspar together with some mafic minerals, especially hornblende. Unlike most igneous rocks, trachyte has little or no quartz. Trachyte is the fine-grained equivalent of syenite. |
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