Simple Lithology

porphyry

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

definition Igneous rock that contains conspicuous phenocrysts in a finer grained groundmass; groundmass itself may be phaneritic or fine-grained. more like this
source LeMaitre et al. 2002 more like this
type
Resource
Concept
broader igneous rock
narrower porphyry
in scheme simplelithology
is primary topic of porphyry