Category:Lithostratigraphy of the Chalk Group

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Subdivisions of the Chalk Group in the UK sector of the Central & Northern North Sea
PALEOCENE ... ...
DANIAN CHALK
GROUP
Ekofisk Formation
UPPER
CRETACEOUS
MAASTRICHTIAN Tor Formation
Mackerel Formation
CAMPANIAN
SANTONIAN
CONIACIAN
TURONIAN
Herring Formation
CENOMANIAN
Hidra Formation