Qapf Classification
QAPF Classification is a systematic petrological framework that classifies igneous rocks based on the relative proportions of quartz (Q), alkali feldspar (A), plagioclase (P), and feldspathoids (F) plotted within a standardized double-triangle diagram.
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Streckeisen Classification
Parents
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A Chemical Classification of Volcanic Rocks Based on the Total Alkali-Silica Diagram
M. J. Le Bas, R. W. Le Maitre, A. Streckeisen et al. · Journal of Petrology · 1986 · 6.6K citations
The IUGS systematics of igneous rocks
M. J. Le Bas, A. Streckeisen · Journal of the Geological Society · 1991 · 733 citations
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JGS · 1 publications · 733 citations
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