Chalk Group Lithostratigraphy: Northern England - Sewerby Steps Marl

This is a c. 60 mm thick, brown, clayey marl, with a sharply defined base (Whitham, 1993).

Macrofossil Biozonation: I. lingua 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.