Foid (syenitoid)

Keyword Definition

Phaneritic crystalline igneous rock with M less than 90, contains between 10 and 60 percent feldspathoid mineral in the QAPF fraction, and has a plagioclase to total feldspar ratio less than 0.5. Includes QAPF fields 11 and 12.

LeMaitre et al. 2002

Parents: Phaneritic igneous rock (189)

Children: Foid monzosyenite (104); Foid syenite (105)

[Description taken from GeoSciML SimpleLithology201012.rdf]

Hierarchical classification

Sample >> Lithosphere >> Rock >> Whole >> Rock >> Igneous >> Phaneritic >> Foid


Foid (monzosyenite) | Foid (syenite)

Category: Analysed material

The different kinds of sample material collected in the field have been classified hierarchically. Examples: “till”, “soil”, “vegetation”. Taken from the “Sample_Types_SHARED” database table.

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