"Sedimentary rock with color, composition, texture and apparent density indicating greater than 50 percent organic content by weight on a moisture-free basis."@en . . "Sedimentary rock with color, composition, texture and apparent density indicating greater than 50 percent organic content by weight on a moisture-free basis."@en . "http://inspire.ec.europa.eu/codelist/LithologyValue/organicRichSedimentaryRock"^^ . . . "organic rich sedimentary rock"@en . "2015-08-18 18:04 PM CEST"^^ . . . . . . . . . . . "organic rich sedimentary rock"@en . .