South-west England Chalk Group Lithostratigraphy: Jukes-Browne & Hill, 1903, 1904 - Cenomanian Limestone Bed A
Where undivided, Jukes-Browne & Hill (1903) described this unit as hard, white, shelly and gritty limestone or very hard, calcareous grit, with a layer of green-coated, locally phosphatised, nodules at the top. The coral-like sponge Acanthochaetetes ramulosus ( formerly Ceriopora ramulosa ) is a characteristic fossil (Jukes-Browne & Hill, 1903).
Macrofossil Biozonation: see under A1 and A2
Correlation: see Correlation with other lithostratigraphical schemes for south-west England
see Correlation with other UK regions
JUKES-BROWNE, A J & HILL, W.1903. The Cretaceous rocks of Britain. Vol. 2 - The Lower and Middle Chalk of England. Memoir of the Geological Survey of the United Kingdom.