31412258argillaceous rockPT2026-03-30 20:50:51UF31412259peliteNDUF31412260rock, argillaceousNDBT31375454sedimentary rock by compositionPTNT31438521argillitePTNT31438522claystonePTNT31438526marlstonePTNT31438527mudstonePTNT31438530shalePT