Chronostratigraphy of the Chalk Group - Campanian Stage

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The Campanian stage was first defined by Coquand (1857) based on an area near Périgueux, SW France (Hancock & Gale, 1996).

Definition of base of stage[edit]

There is a general consensus that the extinction of the crinoid Marsupites testudinarius is a good marker for recognising the base of the Campanian, but this definition has yet to be formally accepted (Hancock & Gale, 1996).

Constituent Chalk Group lithostratigraphical units in the UK[edit]

Integrated southern England Chalk Group lithostratigraphy: Newhaven Chalk Formation (pars), Culver Chalk Formation, Portsdown Chalk Formation (including Studland Chalk)

Northern England: Flamborough Chalk Formation (pars)

East Anglia: Upper Chalk (pars) (including, Pre Weybourne Chalk, Weybourne Chalk, Beeston Chalk & Paramoudra Chalk of Wood, 1988)

N. Ireland: Cloghastucan Chalk Member (pars), Creggan Chalk Member, Boheeshane Chalk Member, Larry Bane Chalk Member, Ballintoy Chalk Member, Glenarm Chalk Member, Garron Chalk Member, Portrush Chalk Member, Ballymagarry Chalk Member

North Sea: Mackerel Formation (pars)

Constituent macrofossil biozones in the UK
UK (except Northern England) Northern England
CAMPANIAN B.mucronata s.l (unexposed)
G.quadrata I.lingua
O.pilula
U.anglicus U.anglicus

Lithostratigraphical marker-beds for the base of the stage[edit]

Southern England: Friar's Bay Marl 1

Northern England: between marls SY17 and SY18 of Whitham (1993)

East Anglia: base of a coarse-grained (Grobkreide facies) chalk at 306.72m depth in the BGS Trunch Borehole [TG 2933 3455], north Norfolk (Wood et al., 1994); not well defined elsewhere in East Anglia

N. Ireland: top of Cloghastucan Chalk Member

References[edit]

COQUAND, H. 1857. Position des Ostrea columba et biauriculata dans le groupe de la craie inférieure. Bulletin de la Société géologique de France (2), 14, 745-766.

HANCOCK, J M & GALE, A S. 1996. The Campanian Stage. Bulletin de l'Institut Royal des Sciences Naturelles de Belgique, 66-Supp, 103-109.

WHITHAM, F. 1993. The stratigraphy of the Upper Cretaceous Flamborough Chalk Formation north of the Humber, north-east England. Proceedings of the Yorkshire Geological Society, 49, 235-258.

WOOD, C J. 1988. The stratigraphy of the Chalk of Norwich. Bulletin of the Geological Society of Norfolk, No. 38, 3- 120.

WOOD, C J, MORTER, A A & GALLOIS, R W. Appendix 1: Upper Cretaceous stratigraphy of the Trunch Borehole. In ARTHURTON, R S, BOOTH, S J, MORIGI, A N, ABBOTT, M A W & WOOD, C J. 1994. Geology of the country around Great Yarmouth. Memoir of the British Geological Survey.