RYGEL, Michael C., Department of Geology, State University of New York, College at Potsdam, 44 Pierrepont Ave, Potsdam, NY 13676, rygelmc@potsdam.edu

KESSLER, Holger¹, DEARDEN, Rachel², and WOOD, Ben¹, (1) British Geological Survey, Kingsley Dunham Centre, Keyworth, Nottingham, NG12 5GG, United Kingdom, hke@bgs.ac.uk, (2) British Geological Survey, Environmental Science Centre, Keyworth, Nottingham NG12 5GG, Nottingham, NG12 5GG, United Kingdom