Sequence stratigraphic correlations within the highly prospective Upper Jurassic sequence of the North Sea are based primarily on biostratigraphic data derived from the study of palynological assemblages. Although these have classically been calibrated to the standard sub-Boreal ammonite zonation, the apparent discovery of anomalous ammonite and dinoflagellate cyst ("dinocyst") assemblages within the Outer Moray Firth (the western arm of the North Sea Rift System) has cast doubt upon the validity of this approach. The implications of these reported anomalies become most obvious when the conflicting biostratigraphic schemes are applied to lithostratigraphic sections from the existing offshore dataset. Palynological and ammonite-based datings conflict to such an extent that they provide correlations which are inaccurate to the tune of not just tens, but hundreds of feet. The aim of this paper is to report the results of an extensive study which integrates the macrofaunas and microfloras from well data (ditch cutting, core and sidewall core samples, as well as ammonites extracted from cored sections) with those derived from strategic field exposures. The resultant new ammonite-dinocyst correlations enable the construction of a robust biostratigraphic template for the Upper Jurassic succession in the North Sea. The integrated stratigraphic scheme provides the first unified and consistent tool for improved understanding of temporal and spatial controls on Upper Jurassic reservoirs in this part of the basin.