Simple Lithology


broader intermediate composition igneous rock
narrower dioritoid
phaneritic igneous rock
narrower dioritoid
definition Phaneritic crystalline igneous rock with M less than 90, consisting of intermediate plagioclase, commonly with hornblende and often with biotite or augite. Plagioclase to total feldspar ratio is greater that 0.65, and anorthite content of plagioclase is less than 50 percent. Less than 10 percent feldspathoid mineral and less than 20 percent quartz in the QAPF fraction. Includes rocks defined modally in QAPF fields 9 and 10 (and their subdivisions). more like this
narrower dioritic rock
broader dioritoid
monzodioritic rock
broader dioritoid
source LeMaitre et al. 2002 more like this
in scheme simplelithology
is primary topic of dioritoid