Fig. 13From: Record of a dense succession of drowning phases in the Alpstein mountains, north-eastern Switzerland: part I—the Lower Cretaceous Tierwis Formation (latest Hauterivian to latest Barremian)A Locality map of the Zeheloch section and photographs of the Drusberg Member. B Bioturbated firmground (D12) in the middle of the Drusberg Member. C Glauconite-rich Chopf Bed topping the firmground (D12). D Focus on the upper Drusberg unit D2. E View on the Drusberg-Schrattenkalk transition at ZehespitzBack to article page