Concept
Alternate Profiles
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- Preferred Labelskos:prefLabel
trachytoid
- URI
- http://resource.geosciml.org/classifier/cgi/lithology/trachytoid ↗Go to the persistent identifier link
- Within Vocab
- Simple Lithology
| Preferred Labelskos:prefLabel | trachytoid |
|---|---|
| Definitionskos:definition | Fine grained igneous rock than contains less than 90 percent mafic minerals, less than 10 percent feldspathoid mineral and less than 20 percent quartz in the QAPF fraction and has a plagioclase to total feldspar ratio less than 0.65. Mafic minerals typically include amphibole or mica; typically porphyritic. Includes rocks defined modally in QAPF fields 6, 7 and 8 (with subdivisions) or chemically in TAS Field T as trachyte or latite. |
| Exact MatchexactMatch |
http://inspire.ec.europa.eu/codelist/LithologyValue/trachytoid
|
| Narrowernarrower |
alkali feldspar trachytic rock
latitic rock trachytic rock |
| Broaderbroader |
fine grained igneous rock
|
| See AlsoseeAlso | Simple Lithology |
| Exampleexample | trachyte(TAS) |
| Is Defined ByisDefinedBy | Simple Lithology |