"Dovey Valley Formation"@en . "Dovey Valley Formation"@en . . "Clay, gravel, sand and silt and trace peat. Stratified superficial deposits. Occurs onshore. Formed during the Holocene Epoch (Quaternary Period) (.0118-0 Ma BP)."@en . . . "Lacustrine deposits"@en . "Generally the present ground surface or, locally, overlain by peat."@en . "Alluvial fan deposits"@en . "DOVEY"@en . "Generally to around 10m."@en . "0.0"^^ . "Unconsolidated, stratified gravels, sands, silts and clays forming the alluvial deposits of the River Dovey (Afon Dyfi) and its tributaries. Includes contemporaneous head, colluvium and pedigenic deposits within the catchment area. Clasts principally consist of local, Lower Palaeozoic turbidites. Aggradational river terraces and major alluvial fans are dominated by pebble cobble gravels and medium- to coarse-grained sand; the modern floodplain is dominated by silt and clay, and locally includes lenses of peat."@en . . . . "Head"@en . . . . "Alluvium"@en . . . "River terrace deposits"@en . "stable"@en . "0.0118"^^ . "Sharp, unconformable and locally channelised on bedrock and Late Devensian head deposits and Welsh glacigenic deposits (including Eryri and Plynlimon till formations). Interdigitates in a complex manner with Tidal Flat Deposits (Gwynllwg Formation of Bowen, 1999) in the estuary."@en . . .