IUGS Chart 1d. FAP. IUGS diagram for naming plutonic/phaneritic igneous rocks with M<90% and with felspathoid present. This is a combination of the bottom halves of charts 1a and 1b on one diagram with a plagioclase composition slider. Names are based on the relative modal proportions of feldspathoid (F), alkali feldspar (A), and plagioclase feldspar (P). Use the slider to see the classification for rocks with An>50%.

For only quartz-bearing plutonic/phaneritic rocks click here: IUGS Plutonic QAP
For the full IUGS QAPF Plutonic chart click here: IUGS Plutonic QAPF