SISSVoc Default


alt label
phonolitic rock more like this
definition Fine grained igneous rock than contains less than 90 percent mafic minerals, between 10 and 60 percent feldspathoid mineral in the QAPF fraction and has a plagioclase to total feldspar ratio less than 0.5. Includes rocks defined modally in QAPF fields 11 and 12, and TAS field Ph. more like this
narrower original
broader phonolitoid original original
broader phonolitoid original
source LeMaitre et al. 2002 more like this
Resource original
Concept original
broader original
narrower phonolitoid original
in scheme simplelithology original
is primary topic of phonolitoid