Fig. 8From: 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)Orthophoto (© swisstopo) of Altmannsattel on which are reported the main lithostratigraphic units, key beds, and discontinuity surfaces. Note the lateral pinching toward the northeast of the sponge-rich and “Drusberg-like” units in the upper part of the Altmann MemberBack to article page