. . "mudstone"@en . . . . . . "Clastic sedimentary rock consisting of less than 30 percent gravel-size (2 mm) particles and with a mud to sand ratio greater than 1."@en . . . . . "2015-08-18 18:04 PM CEST"^^ . . . . "mudstone"@en . "Clastic sedimentary rock consisting of less than 30 percent gravel-size (2 mm) particles and with a mud to sand ratio greater than 1."@en . . "http://inspire.ec.europa.eu/codelist/LithologyValue/mudstone"^^ . .