Chalk Group Lithostratigraphy: Northern England - Middleton Marls

Wood & Smith (1978) identified a c. 50 mm thick brown marl, underlain by spongiferous chalk and the inoceramid bivalve Inoceramus digitatus, as the Middleton Marl. This marl equates with the Upper Middleton Marl of Whitham (1991), minor marls a short distance below, similarly underlain by spongiferous chalk, being designated the Lower Middleton Marls. An un-named marl also occurs above the Upper Middleton Marl of Whitham (1991).

Macrofossil Biozonation: lower M. coranguinum Zone (= Lower Hagenowia rostrata Zone of Whitham, 1991)

Correlation: see Correlation with other UK Chalk Group successions

References

WHITHAM, F.1991. The stratigraphy of the Upper Cretaceous Ferriby, Welton and Burnham formations north of the Humber, north-east England. Proceedings of the Yorkshire Geological Society, Vol. 48(3), 227-255.

WOOD C J & SMITH, E G.1978. Lithostratigraphical classification of the Chalk in North Yorkshire, Humberside and Lincolnshire. Proceedings of the Yorkshire Geological Society, Vol. 42(2), 263-287.