Neocardioceras juddii Zone
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Base: The base of the zone is immediately below the first appearance of the index species (Gale, 1995).
Top: The top of the zone is immediately above the last occurrence of the index species (Gale, 1995).
Range of index species: The zone is coincident with the total range of the index species (Gale, 1995).
Key fauna:
| Bivalvia: | Inoceramus ex gr. pictus |
| Pycnodonte vesiculare | |
| Ammonoidea: | Neocardioceras juddii |
| Sciponoceras sp. (locally abundant) |
Faunal abundance & preservation: Sciponoceras is abundant at several levels in the zone, but is usually found as poorly preserved fragments of internal moulds.
Bio-markers: Gale (1996) recorded an acme of Pycnodonte vesiculare, overlain by three successive acmes of Sciponoceras.
Age: Upper Cenomanian