1. Department of Geology, Salzburg University, Hellbrunnerstrasse 34, Salzburg A-5020, Austria
2. Department of Mineralogy, Studienzentrum Naturkunde, Universalmuseum Joanneum, Graz A-8045, Austria
3. Department of Sedimentology, Vrije University Amsterdam, de Boelelaan 1085, 1081HV Amsterdam, The Netherlands