Chalk Group Lithostratigraphy: Northern England - Danes Dyke Upper Marls

Whitham (1993) identified a single Danes Dyke Upper Marl (= Dane Dyke Upper Marl 1), this being a a c. 30-40 mm thick, grey, chalky marl, the base marking the base of the Sewerby Member. Subsequently, (Mitchell, 1995) identified two other marls in the 5.8 m of overlying chalk, and named them Danes Dyke Upper Marls 2 and 3. The latter are 15-20 mm thick marls, and are conspicuous in an interval of the Sewerby Member in which marls are otherwise poorly developed (Mitchell, 1995).

Macrofossil Biozonation: M. testudinarius Zone

Correlation: see Correlation with other UK Chalk Group successions

References

MITCHELL, S F. 1995. Uintacrinus anglicus Rasmussen from the Upper Ctretaceous Flamborough Chalk Formation of Yorkshire: implications for the position of the Santonian-Campanian boundary. Cretaceous Research, Vol. 16, 745-756.

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.