felsophyric

felsophyric

[¦fel·sə¦fir·ik]
(petrology)
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Phenocrysts of plagioclase and hornblende along with alkali feldspar, quartz and ores are embedded in felsophyric groundmass.
The phenocrysts of plagioclase, hornblende, alkali feldspar and quartz are set in a felsophyric groundmass in a variable amount.
Groundmass is ne grained with felsophyric composition exhibits alteration to sericite, epidote, carbonates, kaolinite and saussurite etc.
These rocks have dominantly plagioclase with subordinate amount of clinopyroxene phenocrysts set in a partially chloritized felsophyric matrix with scattered epidote and opaque phases.