gault formation造句

• The Gault Formation represents a marine transgression following erosion of the Lower Greensand.
• The Wealden Group is overlain by the Lower Greensand and the Gault Formation, consisting of the Gault and the Upper Greensand.
• In Norfolk, the Cretaceous Gault Formation becomes calcareous before passing northwards into the Hunstanton Formation ( " Red Chalk " ).
• The Gault Formation thins across the London Platform and then terminates against the Red Chalk just to the south of The Wash.
• The Wealden Group is overlain by the Lower Greensand and the Gault Formation, consisting of the Gault Clay and the Upper Greensand.
• In places thin, variable junction beds at the base include some limestones . ( BGS lexicon : Gault Formation which belongs to the Selbourne Group ).
• It comprises the Gault Formation ( informally / traditionally the Gault Clay or Blue Marl ) and the overlying Upper Greensand Formation ( earlier known as the Malm or Malm Rock ).