A gravel quarry situated at the vicinity of Dédestapolcsány (Bükk Mountains, NE Hungary) exposes Early Miocene (Karpatian) formations. Sculpturing made by boring organisms may be observed on pebbles of the locality. 42 pebbles were collected at the quarry and epoxy cast of each of them were made. Traces of bioerosion refer to the activity of clionid sponges, polychaete worms, bivalves and barnacles in a high-energy environment of a fossil rocky shore. On the basis of the investigations of the epoxy-casts the following ichnogenera have been distinguished: Entobia, Caulostrepsis, Maeandropolydora, Gastrochaenolites and Rogerella. Two episodes of bioerosion can be recognized. First, boring bivalves formed their characteristic borings. After that sponges and worms produced their traces under deeper conditions. Entobia and Gastrochaenolites are the dominant ichnogenera. Traces of bioerosion observed on the pebbles provide a good example of the Entobia ichnofacies.