(geology) The second age in the Late Cretaceous epoch, or a stage in the Upper Cretaceous series, spanning the time between 93.5 ± 0.8 Ma and 89.3 ± 1 Ma (million years ago), preceded by the Cenomanian stage and underlying the Coniacian stage.
The next deposits, as the scarps are approached, are greensands of "Selbornian" age, succeeded by Cenomanian, and locally by Turonian, sands.
The Turonian is also sandy, but in most areas was not deposited, or has been denuded away during a local uplift that preceded Senonian times.
Wanting Danian Upper Chalk Senonian Middle Chalk Turonian Lower Chalk Cenomanian Upper Green-sand Gault Albian Aptian Lower Green-sand Valenginian Urgonian Wealden Neocomian In the continental classification the deposits from the Gault downwards are grouped as Lower Cretaceous; but in Great Britain there is a strong break below the Gault and 'none above; and the Gault is therefore classed as Upper Cretaceous.
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