Affiliation: | The University of Waterloo, Department of Earth Sciences, Waterloo, Ontario. N2L 3G1;Department of Earth Science, Brock University, 500 Glenridge Ave., St. Catherines, Ontario, L2S 3A1;Kent@craton.geol.brocku.ca (corresponding author);National Water Research Institute, 867 Lakeshore Rd., Burlington, Ontario, N2J 3B7 Canada |