Fenland FormationName
95737Province: The Fens of Cambridgeshire and Lincolnshire, and continuing along the coast of Lincolnshire as far as Humberston near Cleethorpes.
Geologic Age: Ionian Age-Holocene Epoch
Other: Peat, sand and silt with subsidiary clay and gravel. Superficial deposits. Occurs onshore. Formed during the Hoxnian Stage - to - Holocene Epoch (Quaternary Period) (.423-0 Ma BP). Formation encompasses the marine, estuarine and terrestial deposits that were formed in the Fens and adjacent areas during the Holocene and previous interglacial periods. The complex includes fresh and brackish water peats, salt marsh clays, fluvial silts and fine-grained sands, marine sands, and beach-face sands and gravels. In centre of the Fen Basin, five stratigraphical units are present. In ascending order these are basal sand and gravel, the Fen Lower Peat, Barroway Drove Beds, Nordelph Peat and Terrington Beds. Barroway Drove Beds comprise intertidal soft grey clays and silty clays cut by tidal channels and creeks infilled with silt and fine-grained sand. Terrington Beds comprise marine and brackish water silts and fine-grained sands. Marine sands and gravels marginal to the Fen Basin are the Woodstone Member (silty clays and fine sands), the March Gravel Member (sandy gravel to clayey pebbly sand) and the Abbey Sand and Gravel Member (clayey, sandy gravels). c.35m Unconformable of glacial deposits and upon Jurassic and Cretaceous bedrock. Surface.
Usage: Current name
