. "Pyroxene-hornblende-norite"@en . . "Pyroxene-hornblende-norite"@en . . . "PXHBNO"@en . "Pyroxene-hornblende-norite - A type of gabbro. In the Rock Classification Scheme, it is a gabbro with plagioclase 10 - 90%, pyroxene 5 - 85% (<5% clinopyroxene) and hornblende 5 - 85% of plagioclase + pyroxene + hornblende. British Geological Survey Research Report RR/99/06, section 5.1 and figs. 13, 14."@en . . "stable"@en . .