Southern Region Chalk Group Lithostratigraphy: Bristow et al. (1997) - Glauconitic Marl

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Where present, this unit forms the base of the Chalk Group. It is mostly synonymous with the Glauconitic Marl of traditional classifications, except that in some areas (e.g. south-west Wiltshire), strata traditionally regarded as Glauconitic Marl are actually glauconitic calcareous sandstones, and have been re-classified as Upper Greensand (Bristow et al., 1997). The Glauconitic Marl is absent in the Shaftesbury district, over the Mid Dorset Swell and in south-east Devon (Bristow et al., 1997).

Macrofossil Biozonation: M. mantelli Zone, N. carcitanense Subzone

Correlation: see Correlation with other Southern Region Chalk Group classifications

see Correlation with other UK Chalk Group successions


BRISTOW, C. R., MORTIMORE, R. N. & WOOD, C. J. 1997. Lithostratigraphy for mapping the Chalk of southern England. Proceedings of the Geologists' Association, Vol. 108, 293-315.

See: Glauconitic Marl (Traditional Classification)