Affiliation: | 1. Department of Geology, University of Regina, Regina, Saskatchewan, Canada S4S 0A2;2. Geological Survey of Canada — Quebec Division, 490 rue de la Couronne, Quebec, QC, Canada G1K 9A9;3. INRS-ETE 490 rue de la Couronne, Quebec, QC, Canada G1K 9A9;4. Department of Geology, Auburn University, Auburn, Alabama, USA 36849 |