1. https://data.geoscience.earth/ncl
  2. INSPIRE
  3. LithologyValue
  4. _2f0155d0-1243-4a8c-a971-491e4ccdd201
experimental

Entry: trachytoid

URI: http://inspire.ec.europa.eu/codelist/LithologyValue/trachytoid

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.

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is a Concept
submitted bySophie Chaduteau
accepted on 16 Jul 2026 11:53:11.091

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date accepted 16 Jul 2026 11:53:11.091
date submitted 16 Jul 2026 09:17:49.921
definition
entity trachytoid
source graph graph

item class Concept
label trachytoid
notation 2f0155d0-1243-4a8c-a971-491e4ccdd201
register lithology value
status status experimental
submitter
account name s.chaduteau@brgm.fr
name Sophie Chaduteau

type register item
version info 2
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Definition

broader fine grained igneous rock
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.
narrower trachytic rock | latitic rock | alkali feldspar trachytic rock
notation trachytoid
pref label trachytoid
type Concept

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