Southern Region Chalk Group Lithostratigraphy: The North Downs (Robinson, 1986) - East Wear Bay Chalk Formation: Difference between revisions

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The East Wear Bay Chalk Formation (stratotype Copt Point to Hay Cliff, Folkestone [TR 242 365 to TR 301 394] ), c. 58 m thick at Abbots Cliff, comprises rhythmically bedded carbonate-rich and carbonate-poor marly chalk, becoming less argillaceous towards the top of the formation (Robinson, 1986). The basal part of the formation is designated the Glauconitic Marl Member, but no subdivision is recognised for the remainder, which contains local fossil acmes, particularly the bivalve ''Aucellina'' near the base, and the brachiopod ''Orbirhynchia'' at higher levels (Robinson, 1986).
The East Wear Bay Chalk Formation (stratotype Copt Point to Hay Cliff, Folkestone [TR 242 365 to TR 301 394] ), c. 58 m thick at Abbots Cliff, comprises rhythmically bedded carbonate-rich and carbonate-poor marly chalk, becoming less argillaceous towards the top of the formation (Robinson, 1986). The basal part of the formation is designated the Glauconitic Marl Member, but no subdivision is recognised for the remainder, which contains local fossil acmes, particularly the bivalve ''Aucellina'' near the base, and the brachiopod ''Orbirhynchia'' at higher levels (Robinson, 1986).


Latest revision as of 12:24, 7 October 2013

The East Wear Bay Chalk Formation (stratotype Copt Point to Hay Cliff, Folkestone [TR 242 365 to TR 301 394] ), c. 58 m thick at Abbots Cliff, comprises rhythmically bedded carbonate-rich and carbonate-poor marly chalk, becoming less argillaceous towards the top of the formation (Robinson, 1986). The basal part of the formation is designated the Glauconitic Marl Member, but no subdivision is recognised for the remainder, which contains local fossil acmes, particularly the bivalve Aucellina near the base, and the brachiopod Orbirhynchia at higher levels (Robinson, 1986).

Macrofossil Biozonation: M. mantelli, M. dixoni and A. rhotomagense zones (Robinson, 1986)

Correlation: see Correlation with other lithostratigraphical schemes for the Southern Region

see Correlation with other UK regions

References

ROBINSON, N D.1986. Lithostratigraphy of the Chalk Group of the North Downs, southeast England. Proceedings of the Geologists' Association, Vol. 97, 141-170.

See: Glauconitic Marl Member (Robinson, 1986), marl

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