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Trachyte

Trachyte (/ˈtreɪkaɪt, ˈtræk-/) 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.

Geographic distribution, Mineralogy & Overview

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Classification
Felsic
Equivalents
Intrusive variant is syenite
Primary
Alkali feldspar
Secondary
Plagioclase, quartz, or feldspathoid
Texture
Aphanitic

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Overview

Chemical composition

Mineralogy

Geographic distribution

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Map overview Semantic statistics

Trachyte

Nodes123
Edges122
Triples89
Avg. degree1.98
Density0.01626
Components1

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Trachyte

Top relations

related to Geographic distribution · 49
Trachyte → Aegean Sea, Aeolian, As, Ascension, Auvergne, Azores, Big Bend, Big Bend Ranch State, Black Hills, Bohemia, Cambewarra Range, Campi Flegrei, Cenozoic, Chisos Mountains, Davis Mountains, East Africa, Eifel, Euganean Hills, Europe, Hawaiʻi
related to Mineralogy · 14
Trachyte → Biotite, Drachenfels, In, QAPF, Relatively, Rhine, Rhomb, Some, Sometimes, The, They, This, Trachytes, Two
related to External links · 9
Trachyte → Cambridge University Press, Encyclopædia Britannica, Flett, Hugh, In Chisholm, John, Porphyritic, This, Vol
related to Chemical composition · 8
Trachyte → K2O, Na2O, QAPF, SiO2, TAS, These, This, Trachydacite
Classification · 1
Trachyte → Felsic
Equivalents · 1
Trachyte → Intrusive variant is syenite
Primary · 1
Trachyte → Alkali feldspar
Secondary · 1
Trachyte → Plagioclase, quartz, or feldspathoid
Texture · 1
Trachyte → Aphanitic
is a · 1
Trachyte → rock type called keratophyre

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Important terminology

trachytes also alkali rocks common rock quartz minerals groundmass augite feldspar often sanidine crystals known occur usually found phenocrysts plagioclase

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
TrachyteClassificationFelsic1.00infobox
TrachyteEquivalentsIntrusive variant is syenite1.00infobox
TrachytePrimaryAlkali feldspar1.00infobox
TrachyteSecondaryPlagioclase, quartz, or feldspathoid1.00infobox
TrachyteTextureAphanitic1.00infobox
Trachyteis arock type called keratophyre0.90text
nepheline may also be presentinstance ofRelatively minor plagioclase and quartz or a feldspathoid0.80text
trachyte are rare in the Archeaninstance ofPermian trachytes occur also in Thuringia and the Saar district in Germany.Alkaline rocks0.80text
but become common in the Proterozoicinstance ofPermian trachytes occur also in Thuringia and the Saar district in Germany.Alkaline rocks0.80text
Trachyterelated to Chemical compositionThis0.60section
Trachyterelated to Chemical compositionSiO20.60section
Trachyterelated to Chemical compositionNa2O0.60section

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    Min side: 3
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