. . . . . . . . "Igneous rock that contains greater than 50 percent massive glass."@en . "glass rich igneous rock"@en . . . . "2015-08-18 18:03 PM CEST"^^ . "glass rich igneous rock"@en . . . "http://inspire.ec.europa.eu/codelist/LithologyValue/glassRichIgneousRock"^^ . "Igneous rock that contains greater than 50 percent massive glass."@en . .