1. The Deep Time Institute 13809 Research Boulevard Suite 500 #94952 Austin Texas 78750 USA
2. Department of Earth Sciences University of Geneva Geneva 1205CH Switzerland
3. Faculty of Geosciences Utrecht University Utrecht 3584CB The Netherlands
4. Department of Geography Durham University Durham DH1 3LE UK
5. Geological Survey of Canada (Atlantic) Natural Resources Canada 1 Challenger Drive Dartmouth Nova Scotia B2Y 4A2 Canada
6. Department of Geoscience University of Calgary Calgary AB T2N 1N4 Canada