Hand Sample Missing
Thin Section Missing

Foid-Bearing Alkali Feldspar Trachyte

IUGS Definition ( QAPF Chart )

Foid-Bearing Alkali Feldspar Trachyte: “A collective term for alkali feldspar trachytes containing small amounts of feldspathoids (less than 10% of the felsic minerals).”
Typical Minerals
  • MINERAL
  • MINERAL
  • MINERAL
  • MINERAL
  • ACCESSORY MINERALS