"Taken at the incoming of low angle cross bedded lilac coloured conglomerates, conglomeratic quartzites and coarse-grained quartzites of the Mynydd Myddfai Formation above the thick bedded greenish grey and purple fine-grained sandstones of the Cwar Glas Member of the Hafod Fawr Formation."@en . "Greenish grey mudstones and siltstones with abundant thin to medium bedded fine-grained sheet sandstones. Scattered burrows. Packets of thicker bedded green grey and purple fine-grained sandstone with hummocky cross statification and parallel lamination occur throughout the member. In the west of the outcrop the member becomes predominantly sandstone."@en . . . "Taken at the base of the first packet of thick bedded fine-grained sandstone with hummocky cross statification and parallel lamination of the Cwar Glas Member above the mudstones and siltstones with abundant thin to medium bedded fine-grained sheet sandstones of the Hafod Fawr Formation."@en . "Cwar Glas Member"@en . "CWGL"@en . . "0 to 66m"@en . "Grammysia Beds [Obsolete: use CWGL, GYB]"@en . . "Grammysia Bed [Obsolete: use CWGL]"@en . "Cwar Glas Member"@en . . "stable"@en . . "Carn Powell Facies [Obsolete: use CWGL]"@en . . . . . "Carn Powell Facies (of Black Cock Beds) [Obsolete: use CWGL]"@en . "422.7"^^ . . . "Mudstone and sandstone with subsidiary siltstone. Stratified bedrock. Occurs onshore. Deposited during the Ludlow Epoch (Silurian Period) (426.7-422.7 Ma BP)."@en . "426.7"^^ .