1. Faculty of Geology, Geophysics and Environmental Protection; AGH - University of Science and Technology; al. Mickiewicza 30 Kraków 30-059 Poland
2. Department of Earth Sciences; Uppsala University; Villavägen 16 Uppsala SE-752-36 Sweden
3. Institute of Geological Sciences; Polish Academy of Sciences; ul. Senacka 1 Kraków 31-002 Poland