Chalk Group Lithostratigraphy: East Anglia - Overstrand Pyramidata Hardground

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This hardground is represented by a mass of fossils and hard chalk, derived from immediately underlying strata, exposed at low water mark c. 135 m west of the end of the promenade at the foot of the road down the cliff at Overstrand [TG 2490 4100] (Peake & Hancock, 1970; Johansen & Surlyk, 1990). The hardground is characterised by the echinoid Echinocorys pyramidata and is taken by Pitchford (1990a) and Johansen & Surlyk (1990) to mark the top of the Paramoudra Chalk.

Macrofossil Biozonation: top B. mucronata Zone

Correlation: see Correlation with other UK Chalk Group successions

References

JOHANSEN, M B & SURLYK, F.1990. Brachiopods and the stratigraphy of the Upper Campanian and Lower Maastrichtian Chalk of Norfolk, England. Palaeontology, Vol. 33(4), 823-872.

PEAKE, N B & HANCOCK, J M. 1970. The Upper Cretaceous of Norfolk [reprinted with corrigenda and addenda] In LARWOOD, G P & FUNNELL, B M (eds.), The Geology of Norfolk. London & Ashford.

PITCHFORD, A J.1990a. A Summary of the stratigraphy of current exposures of Belemnitella mucronata Zone Chalk (Campanian, Upper Cretaceous) in Norfolk. Bulletin of the Geological Society of Norfolk, Vol. 40, 3-24.

See: Paramoudra Chalk

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