Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, and The NORM Group, Cambridge, MA, USA, 77 Massachusetts Avenue, Cambridge, MA 02139, United States
Department of Geology and Geological Engineering, University of North Dakota,, 81 Cornell, Stop 8358, Grand Forks, ND 58202, United States
Department of Physics, University of Guelph, and The NORM Group, Guelph, ON, Canada, 5 Maplewood Dr, Guelph, ON N1G 1L9, Canada
Department of Physics, University of North Dakota, 101 Cornell Mail Stop 7129, Grand Forks, ND 58202-7129, United States