Abstract
Summary Improved knowledge of the stratigraphy and palaeontology of the Sandringham Sands of Norfolk permits the recognition of four divisions, named in ascending order: Roxham Beds (Middle Volgian), Runcton Beds (Upper Volgian), Mintlyn Beds (Ryazanian) and Leziate Beds (Valanginian). These marine strata span the Jurassic–Cretaceous boundary and represent the interval during which the topmost Portland Beds, the Purbeck Beds and the Hastings Beds of southern England were accumulated. The Sandringham Sands rest disconformably on the Kimmeridge Clay and nodule-beds and erosion surfaces mark the lower and upper limits of the Runcton Beds. Palaeontologically the Mintlyn Beds can be divided into a lower set of strata with Hectoroceras (unique in western Europe), preserved mainly at West Dereham, and an upper set with Surites and allies found in the King’s Lynn area. Strata above the Leziate Beds formerly included in the Sandringham Sands are united with the Snettisham Clay under the new name Dersingham Beds, which comprise an interfingering complex of marine Hauterivian–Barremian sands, silts and clays roughly equivalent in age to the Weald Clay of the south. Interpretation of the whole sequence is complicated by lateral changes in lithology, intraformational erosion and by regional overstep of the Carstone.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
