. "Olivine-pyroxene-microhornblendite"@en . . "MCOPXH"@en . "stable"@en . . . . "Olivine-pyroxene-microhornblendite - A type of microhornblendite. In the Rock Classification Scheme, it is the medium-grained equivalent of olivine-pyroxene-hornblendite. British Geological Survey Research Report RR/99/06, section 5.1."@en . "Olivine-pyroxene-microhornblendite"@en . .