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From: Le Maitre (Ed), 1989. A classifica;on of Igneous Rocks and Glossary of Terms -‐ Recommenda;ons of the Interna;onal Union of Geological Sciences, Subcommission on Systema;cs of Igneous Rocks. Blackwell Sci. Publ. 193 pp.
English
“Percentage es/ma/on comparison charts” From: “Petrography of Igneous and Metamorphic Rocks” (PhilpoRs, 1989).
Italiano
Classificazione rocce gabbroidi
M < 10 % = anortosite M > 10 % & An(plag) > 50 = gabbro M > 10 % & An(plag) < 50 = diorite
Classificazione rocce ultramafiche
(M > 90%)