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Trachyandesite

A rock classification type
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09149230017272472726022.jpg
Latite, etc.

Calton Quarry, Monte Alto, Montegrotto Terme, Padova Province, Veneto, Italy
09149230017272472726022.jpg
Latite, etc.

Calton Quarry, Monte Alto, Montegrotto Terme, Padova Province, Veneto, Italy
02877700017271952974610.jpg
Latite, etc.

Calton Quarry, Monte Alto, Montegrotto Terme, Padova Province, Veneto, Italy
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About TrachyandesiteHide

A fine grained, usually extrusive, alkaline/basic rocktype intermediate between basaltic andesite and phonolite, difficult to define without chemistry on the TAS diagram. Also intermediate in composition between trachyte and andesite, containing sub equal amounts of both sodic plagioclase and alkali feldspar, with subordinate amounts of one or more mafic minerals (biotite, amphibole, or pyroxene).

It is usually considered synonymous with latite and trachybasalt.

See Also: mugearite

Ref: AGI


Unique IdentifiersHide

Mindat ID:
48471
Long-form identifier:
mindat:1:1:48471:2

Classification of TrachyandesiteHide

TAS_S3.png

Trachyandesite is found in field S3 in the TAS diagram.

Sub-divisions of TrachyandesiteHide

Age distributionHide

Recorded ages:
Phanerozoic : 298.9 ± 0.15 Ma to 0.69 Ma - based on 9 recorded ages.

Synonyms of TrachyandesiteHide

Internet Links for TrachyandesiteHide

References for TrachyandesiteHide

Quick NavTopAbout TrachyandesiteUnique IdentifiersClassification Sub-divisions Age distributionSynonymsInternet Links References
 
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