Simple Lithology

foid syenitoid

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. more like this
narrower foid monzosyenite
broader foid syenitoid
foid syenite
broader foid syenitoid
source LeMaitre et al. 2002 more like this
broader phaneritic igneous rock
narrower foid syenitoid
in scheme simplelithology
is primary topic of foid syenitoid