"419.0"^^ . "stable"@en . . . . "422.7"^^ . "Downton Castle Sandstone Formation And Temeside Mudstone Formation (Undifferentiated)"@en . . . "Downton Castle Sandstone Formation And Temeside Mudstone Formation (Undifferentiated)"@en . "Siliciclastic argillaceous rock with subsidiary micaceous sandstone, mudstone, sandstone and siltstone."@en . . "Siliciclastic argillaceous rock with subsidiary micaceous sandstone, mudstone, sandstone and siltstone. Bedrock. Occurs onshore. Formed during the Pridoli Epoch (Silurian Period) (422.7-419 Ma BP)."@en . "DCTE"@en . .