1. Department of Physical Geography, Eötvös Loránd University, Budapest H-1117, Hungary
2. Research Center for Inland Seas, Kobe University, Nada, Kobe 657–8501, Japan
3. Department of Physical and Applied Geology, Eötvös Loránd University, Budapest H-1117, Hungary
4. MOL, Hungarian Oil and Gas Plc, Budapest H-1117, Hungary