Fig. 7From: Record of a dense succession of drowning phases in the Alpstein mountains, northeastern Switzerland: Part II—the Lower Cretaceous Schrattenkalk Formation (late Barremian)A Overview in the Tierwis-Grauchopf section of the top of the Schrattenkalk Formation (unit S3) overlain by the Garschella Formation represented here by the Selun member. B View of the Requienidae-bearing beds of unit S3. C Focus on the irregular topography with epikarstic features on top of unit S3, filled with a phosphatic conglomerateBack to article page