peridotite pyroxenite Ol Cpx Opx 90 90 10 10 5 5 5 40 40 dunite clinopyroxenite orthopyroxenite websterite harzburgite wehrlite olivine websterite lherzolite olivineclinopyroxenite olivineorthopyroxenite IUGS Classification1e. Ultramafic Rocks

Chart 1g - Ultramafic Rocks (M > 90%). IUGS classification of ultramafic rocks based on the relative modal proportions of orthopyroxene (Opx), Olivine (Ol), and clinopyroxene (Cpx).

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