Badenian tuffite levels within the Carpathian orogenic front (Gdow-Bochnia area, Southern Poland): radio-isotopic dating and stratigraphic position

We pres ent new re sults of in ves ti ga tion of Mid dle Mio cene Badenian tuffite lev els ex posed in South ern Po land within the Gdów “embayment” area (tuffites from Wiatowice, up per part of the Skawina Beds, foraminiferal biozone IIg) and com pare them with the well known and ex ten sively de scribed Bochnia Tuffite level at Chodenice near Bochnia (up per part of the Chodenice Beds, foraminiferal biozone IIIA). The 40Ar/39Ar ages of the glass sep a rates ob tained from these lay ers were de ter mined ap ply ing (stan dard) in cre men tal heat ing tech niques the Wiatowice and Bochnia tuffites have been dated to be 13.76 ±0.08 Ma, and 13.62 ±0.10 Ma old, re spec tively.