foyalite
Noun
A fine-grained Plutonic syenite made up of orthoclase, nepheline, hornblende, and accessory mica, sodalite, zircon, noselite, and pyroxene.
Usage- Countable
- Uncountable
- Examples
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[…] while foyalite is an almost pure iron-chrysolite.
More examples (1)
The free energy remains negative throughout the whole temperature range, indicating that the association forstorite + ilmenite is thermodynamically more stable than foyalite + geikielite.
Thin section photograph of foyalite (peralkaline phonolite) from Sevrano ki Dhani.
Word forms
foyalites