School of Earth and Ocean Sciences, University of Victoria, P.O. BOX 3055 STN CSC, Victoria, BC V8W 3P6 Canada ; Pacific Geoscience Center, Geological Survey of Canada, 9860 West Saanich Rd., Sidney, BC V8L 4B2 Canada
School of Earth and Ocean Sciences, University of Victoria, P.O. BOX 3055 STN CSC, Victoria, BC V8W 3P6 Canada ; Pacific Geoscience Center, Geological Survey of Canada, 9860 West Saanich Rd., Sidney, BC V8L 4B2 Canada
Pacific Geoscience Center, Geological Survey of Canada, 9860 West Saanich Rd., Sidney, BC V8L 4B2 Canada
Pacific Geoscience Center, Geological Survey of Canada, 9860 West Saanich Rd., Sidney, BC V8L 4B2 Canada
Pacific Geoscience Center, Geological Survey of Canada, 9860 West Saanich Rd., Sidney, BC V8L 4B2 Canada