"Metafelsic-rock"@en . . "stable"@en . "Metafelsic-rock"@en . "MFELSR"@en . . . . . "Metafelsic-rock - A class within meta-igneous rock based on modal composition. In the Rock Classification Scheme, these are coarse-grained meta-igneous rocks containing 65% or more felsic minerals and 35% or less mafic minerals. British Geological Survey Research Report RR/99/02, section 5.2 and figs. 1, 8 and 9."@en .