File:Trachyt_Herz_Jesu_Kirche_Aachen.jpg · Wikimedia Commons · See Wikimedia Commons
Trachyte () 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
Article · 日本語
粗面岩（そめんがん、trachyte、トラカイト）は、であるが石英をほとんど含まず、アルカリ長石を主成分とする珪長質火山岩。深成岩の閃長岩に対応する。
Abstract from DBpedia / Wikipedia · CC BY-SA