Chalk Group Lithostratigraphy: East Anglia - Top Rock
The Top Rock of East Anglia matches descriptions of its habit and occurrence in the adjacent Chilterns region. In the Bury St. Edmunds district, it is a 0.4 m thick bed of intensely indurated limestone, with a convolute, glauconitised hardground at its top, strewn with glauconitised and phosphatised pebbles, with a fauna that is superficially similar to the 'Reussianum Fauna' of the Chalk Rock (Bristow, 1990).
Macrofossil Biozonation: upper S. plana Zone & M. cortestudinarium Zone
Correlation: see Correlation with other UK Chalk Group successions
References
BRISTOW C R. 1990. Geology of the country around Bury St. Edmunds. Memoir of the British Geological Survey.
See: Top Rock (Chilterns Region), Reussianum Fauna