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Webster 1913 Edition
Trachyte
Tra′chyte
,Noun.
[Gr. [GREEK] rough, rugged: cg. F.
trachyte
.] (Geol.)
An igneous rock, usually light gray in color and breaking with a rough surface. It consists chiefly of orthoclase feldspar with sometimes hornblende and mica.
Webster 1828 Edition
Trachyte
TRA'CHYTE
,Noun.
Definition 2024
trachyte
trachyte
English
Noun
trachyte (plural trachytes)
- (geology) A pale igneous rock consisting mostly of potassium feldspar and plagioclase.
- 2004, Richard Fortey, The Earth, Folio Society 2011, p. 52:
- The type of rock that results is often described as trachyte and contains abundant crystals of a different kind of alkali-rich feldspar, such as sanidine, rather than plagioclase.
- 2004, Richard Fortey, The Earth, Folio Society 2011, p. 52: