1. Department of Earth Sciences, Dartmouth College, HB6105 Fairchild Hall, Hanover, NH 03755, USA
2. Department of Earth and Environmental Sciences, University of Iowa, 115 Trowbridge Hall, Iowa City, IA 52242, USA
3. Department of Geography and Geosciences, University of Vermont, 180 Colchester Ave, Burlington, VT 05405, USA
4. Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, Adama Mickiewicza 30, Kraków, 30-059, Poland