The argillaceous succession at South Cave Station Quarry, East Yorkshire, historically described as the Oxford Clay, can be divided into the Callovian Oxford Clay Formation (upper part of the Peterborough Member and the Stewartby Member) and the Brantingham Formation of Oxfordian age. Of the standard Jurassic chronostratigraphical zones, the Coronatum Zone may be present as a thin bed of clayey sandstone at the base of the Oxford Clay Formation. The overlying beds of this formation belong to the Athleta Zone (Phaeinum and Proniae subzones), and the Brantingham Formation at South Cave Station Quarry belongs to the Cordatum Subzone of the Cordatum Zone. Two significant non-sequences have been recorded. The lower non-sequence, spanning the Jason Zone and perhaps part of the Coronatum Zone, is also present in North Yorkshire and Lincolnshire. The higher non-sequence, from the Spinosum Subzone of the Athleta Zone to the Costicardia Subzone of the Cordatum Zone, appears to be restricted to the South Cave and the Acklam area, near Malton, in North Yorkshire. Clear links have been established between the ammonite assemblages of the Proniae Subzone at South Cave and those at Peckondale Hill and Acklam, both near Malton, and in the area between Peterborough and Oxford.