Department of Civil Engineering, Texas Tech University, P.O. Box 42101, Lubbock, TX 79409 United States ; Department of Geosciences, Texas Tech University, P.O. Box 41053, Lubbock, TX 79409 United States
Environment Canada, 4905 Dufferin St, Toronto, ON M3H 5T4 Canada
Lamont- Doherty Earth Observatory of Columbia University, P.O. Box 1000, Route 9W, Palisades, NY 10964-8000 United States
Mining and Mineral Sciences Laboratories, CANMET, 555 Booth St, Ottawa, ON K1A 0G1 Canada
Lamont- Doherty Earth Observatory of Columbia University, P.O. Box 1000, Route 9W, Palisades, NY 10964-8000 United States ; British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 0ET United Kingdom ;
Department of Geosciences, Texas Tech University, P.O. Box 41053, Lubbock, TX 79409 United States