Chalk Group Lithostratigraphy: Marlborough Downs/Berkshire Downs/Chilterns - Glauconitic Marl

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Where developed, this unit is synonymous with the Glauconitic Marl of the Southern Region Chalk Group. The Glauconitic Marl thins north-east of Princes Risborough [SP 80 03], and at Barton-le-Clay [TL 08 32] passes abruptly into the Cambridge Greensand (Wood, 1996).

Macrofossil Biozonation: M. mantelli Zone (Rawson et al., 1978)

Correlation: see Correlation with other parts of the UK


WOOD, C. J. 1996. Upper Cretaceous: the Chalk Group. In SUMBLER, M. G., British Regional Geology: London and the Thames Valley. Fourth Edition. (London: HMSO for the British Geological Survey).

See: Glauconitic Marl (Southern Region Chalk Group), Cambridge Greensand