Outcrop of non-bedded limestone of a cliffed coast. A Naturdenkmal, type area of a Lower Miocene sea between Alb and Alps („Upper Marine Molasse“ bed of the Molasse basin, recent 585 m). The cliff wall is perforated by borings of marine bivalve mollusca (Pholadidae). The cliff is verified and documented from the west of the Swabian Alb to the Lower Franconian Alb, except below the meteoritic impactite of the Nördlinger Ries. The Pholad borings measure 0,5-2 cm at the top of the rock and 3 cm at the bottom. The borings obviously represent several generations.