Simple Lithology

phonolitoid

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

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 phonolilte
broader phonolitoid
tephritic phonolite
broader phonolitoid
source LeMaitre et al. 2002 more like this
type
Resource
Concept
broader fine grained igneous rock
narrower phonolitoid
in scheme simplelithology
is primary topic of phonolitoid