Article: Jurassic–Cretaceous biostratigraphy of Norway, with comments on the British Rasenia cymodoce Zone

Extensive collections from exposed and mechanically excavated sections permit the recognition of Middle Jurassic to Neocomian deposits in Andoya, northern Norway. Non-marine Bajocian-Bathonian is recognized by an assemblage of spores and pollen showing a close resemblance to that from the Middle Jurassic of Trondelag, Scania, and the Netherlands, but with some differences from Middle Jurassic assemblages from Britain. Marine Upper Jurassic sediments contain ammonites and dinocysts that permit the recognition of the Rasenia cymodoce Zone of the Lower Kimmendgian, and the Pavlovia rotunda-Progalbanites albani zones of the Middle Volgian. The Upper Ryazanian Surites spasskensis Zone is the only zone recognized in the Neocomian sequence, but dinocysts, buchias, and ammonites suggest the presence of Valanginian beds above the S. spasskensis Zone. The boreal fauna shows close affinities with faunas from England, East Greenland, and Siberia. Similarly, dinocyst assemblages are comparable with those from other areas in north-west Europe and the Arctic, but the Ryazanian-Valanginian dinocyst assemblage shows closer links with boreal assemblages from Spitsbergen, the Moscow Basin, and the North Slope of Alaska. On the basis of material from Market Rasen (England) and Andoya the subdivision of the R. cymodoce Zone is discussed.