. "Quartzose-porcellanite"@en . "Quartzose-porcellanite"@en . . . "QPORC"@en . . "stable"@en . "Quartzose-porcellanite - A type of porcellanite in which the silica consists predominantly of quartz. British Geological Survey Research Report RR/99/03, section 8.2 and fig. 12."@en . .