"Slaty mudstone with sedimentary rock, metamorphic rock and igneous rock clasts"@en . "stable"@en . . "Slaty mudstone with sedimentary rock, metamorphic rock and igneous rock clasts"@en . . . . "Slaty mudstone with sedimentary rock, metamorphic rock and igneous rock clasts"@en . . . . "SMSMI"@en . .