"Trachytoid that has a plagioclase to total feldspar ratio less than 0.1, between 0 and 5 percent quartz in the QAPF fraction, and no feldspathoid minerals. QAPF field 6."@en . . . . "alkali feldspar trachyte"@en . . . "Trachytoid that has a plagioclase to total feldspar ratio less than 0.1, between 0 and 5 percent quartz in the QAPF fraction, and no feldspathoid minerals. QAPF field 6."@en . . "http://inspire.ec.europa.eu/codelist/LithologyValue/alkaliFeldsparTrachyte"^^ . . "2015-08-18 18:01 PM CEST"^^ . . . . . . . "alkali feldspar trachyte"@en .