Simple Lithology

syenitoid

http://resource.geosciml.org/classifier/cgi/lithology/syenitoid

unstar this property definition Phaneritic crystalline igneous rock with M less than 90, consisting mainly of alkali feldspar and plagioclase; minor quartz or nepheline may be present, along with pyroxene, amphibole or biotite. Ratio of plagioclase to total feldspar is less than 0.65, quartz forms less than 20 percent of QAPF fraction, and feldspathoid minerals form less than 10 percent of QAPF fraction. Includes rocks classified in QAPF fields 6, 7 and 8 and their subdivisions. more like this
star this property narrower alkali feldspar syenitic rock
star this property broader syenitoid
monzonitic rock
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syenitic rock
star this property broader syenitoid
star this property source LeMaitre et al. 2002 more like this
star this property type
Resource
Concept
star this property broader phaneritic igneous rock
star this property narrower syenitoid
star this property in scheme simplelithology
star this property is primary topic of syenitoid& properties=definition