en2015-08-18 18:03 PM CESThttp://inspire.ec.europa.eu/codelist/LithologyValue/glassRichIgneousRock:1http://inspire.ec.europa.eu/codelist/LithologyValue/glassRichIgneousRockIgneous rock that contains greater than 50 percent massive glass.en2015-08-18 18:03 PM CESThttp://inspire.ec.europa.eu/codelist/LithologyValue/glassyIgneousRock:1http://inspire.ec.europa.eu/codelist/LithologyValue/glassyIgneousRockIgneous rock that consists of greater than 80 percent massive glass.