Simple Lithology


definition Phaneritic crystalline igneous rock that contains less than 90 percent mafic minerals, and up to 20 percent quartz or up to 10 percent feldspathoid in the QAPF fraction. The ratio of plagioclase to total feldspar is greater than 0.65, and anorthite content of the plagioclase is greater than 50 percent. Includes rocks defined modally in QAPF fields 9 and 10 and their subdivisions. more like this
narrower gabbroic rock
broader gabbroid
monzogabbroic rock
broader gabbroid
source LeMaitre et al. 2002 more like this
broader phaneritic igneous rock
narrower gabbroid
in scheme simplelithology
is primary topic of gabbroid