Chalk Group Lithostratigraphy: Northern England - Danes Dyke Lower Marls
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A group of three marls, each c. 20-30 mm thick, pale grey, silty and partly gradational (Whitham, 1993).
Macrofossil Biozonation: M. testudinarius Zone
Correlation: see Correlation with other UK Chalk Group successions
References
WHITHAM, F.1993. The stratigraphy of the Upper Cretaceous Flamborough Chalk Formation north of the Humber, north-east England. Proceedings of the Yorkshire Geological Society, Vol. 49(3), 235-258.