Simple Lithology

foid gabbroid

definition Phaneritic crystalline igneous rock in which M is less than 90, the plagioclase to total feldspar ratio is greater than 0.5, feldspathoids form 10-60 percent of the QAPF fraction, and plagioclase has anorthite content greater than 50 percent. These rocks typically contain large amounts of mafic minerals. Includes rocks defined modally in QAPF fields 13 and 14. more like this
narrower foid gabbro
broader foid gabbroid
foid monzogabbro
broader foid gabbroid
source LeMaitre et al. 2002 more like this
broader phaneritic igneous rock
narrower foid gabbroid
in scheme simplelithology
is primary topic of foid gabbroid