File:Trachyt_Herz_Jesu_Kirche_Aachen.jpg · Wikimedia Commons · See Wikimedia Commons
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Sign in to saveTrachyte () is an extrusive igneous rock composed mostly of alkali feldspar. It is usually light-colored and aphanitic (fine-grained), with minor amounts of mafic minerals, and is formed by the rapid cooling of lava (or shallow intrusions) enriched with silica and alkali metals. It is the volcanic equivalent of syenite.
Key facts
- Rock.name
- Trachyte
- Rock.type
- Igneous
- Rock.image
- Trachyt Herz Jesu Kirche Aachen.jpg
- Rock.caption
- A cut sample of trachyte, with phenocrysts of sanidine, in a wall in Germany
- Rock.composition
- Alkali feldspar
- Rock.composition_secondary
- Plagioclase, quartz, or feldspathoid
- Rock.class
- Felsic
- Rock.texture
- Aphanitic
- Rock.Equivalent
- Intrusive variant is syenite
via Wikipedia infobox
Wikidata facts
- Image
- Mineraly.sk - trachyt.jpg
Show 2 more facts
- Commons category
- Trachyte
- described by source
- Encyclopædia Britannica 11th edition
via Wikidata · CC0