The Silurian and Devonian in the surroundings of Nekézseny (southernmost Uppony Mts, Northern Hungary)

The athrogenic and volcanic sequence (Strázsahegy Formation) of the Strázsa-hegy section, at first regarded as Middle Triassic and later assumed to be Lower Devonian (Lochkovian), could be placed into the Middle Devonian. From olistolites within the tuffitic parts of this formation a complete highly fossiliferous Silurian sequence (similar to the Silurian of the Cellon section in the Carnic Alps, and consisting mainly of pelagic micritic limestones, among these also nautiloid limestones) could be reconstructed. The geological evolution of the UpponyMts from the Upper Ordovician up to the Bashkirian (Middle Carboniferous) is briefly discussed (Fig. 1 and 2)