The textural classification is based on the classification of R.J. Dunham

GENERAL CLASSIFICATION AND NOMENCLATURE OF PLUTONIC ROCKS

ULTRAMAFIC ROCKS COMPOSED OF OLIVINE, ORTHOPYROENE AND CLINOPYROXENE

ULTRAMAFIC ROCKS THAT CONTAIN HORNBLENDE

GABBROIC ROCKS COMPOSED OF PLAGIOCLASE, PYROXENE AND OLIVINE

SUBDIVISION OF GABBROIC ROCKS INTO GABBRO, GABBRONORITE AND NORITE

GABBROIC ROCKS THAT CONTAIN HORNBLENDE