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Micropalaeontology and stratigraphical setting of the Cambridge Greensand

Abstract The stratigraphical position of the Cambridge Greensand is confirmed as lowermost Cenomanian and the hiatus at the Albian/Cenomanian boundary described from a number of localities in SE England and East Anglia. The various sedimentary packages in the uppermost Albian and lowermost Cenomanian record a series of sea-level changes, confirmed by the changes in the foraminiferal assemblages (and other microfossils). The historical disagreements between the stratigraphical interpretations of the microfossils and macrofossils are discussed and resolved.