Michael Riedel
Co-Chief Scientist
Pacific Geoscience Centre
Geological Survey of Canada
9860 West Saanich Road
PO Box 6000
Sidney BC V8L 4B2
Canada
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Timothy S. Collett
Co-Chief Scientist
U.S. Geological Survey
Energy Resources Program
Denver Federal Center
Box 25046, MS 939
Denver CO 80225
USA
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