A horizon with pot casts (potholes) is described from shallow-marine limestones of the spinosus-zone ('Discitesschichten', Upper Muschelkalk) near Weimar/ Thuringia. The erosional structures are not developed as sole marks but occur as isolated structures. They differ distinctly in size and composition from pot casts de- scribed from the Muschelkalk of Southern Germany. Vertical sedimentary zonation and varying sediment infill in the structures suggest continuous erosion and deposition contemporaneous with the background sedi- mentation. Deposition may have been caused by oscilla- tory and unidirectional flows as well as a long period of micrite deposition. Early diagenetic deformations (e.g. dewatering, brecciation, pressure solution) have control- led by a higher continuous water flux inside the pot casts and higher intergranular dispersal pressure.(