Qapf Diagram

Qapf Diagram. In plutonic rocks, all of the minerals are crystallized into visible grains. The acronym QAPF stands for " Quartz, Alkali feldspar, Plagioclase, Feldspathoid (Foid)".

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Rhyodacite is a volcanic rock intermediate in composition between dacite and rhyolite. They are not designed with the chemical composition of the rocks in the mind. It is made of two ternary diagram s with the corners Q, A, P and F, A, P, adjoined to each other along their A-P edge.

In plutonic rocks, all of the minerals are crystallized into visible grains.

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The acronym, QAPF, stands for "Quartz, Alkali feldspar, Plagioclase, Feldspathoid (Foid)". QAPF diagram represents only the normalized felsic (light colored minerals) part of the rock, so for this illustration I avoided adding mafic (dark colored) minerals. QAPF Diagram Learn with flashcards, games, and more — for free.

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