1. School of Earth Sciences and Environmental SustainabilityNorthern Arizona UniversityFlagstaff Arizona USA
2. U.S. Geological Survey, Denver Federal CenterDenver Colorado USA
3. Department of Earth ScienceRice UniversityHouston Texas USA
4. Laboratoire de Géologie de Lyon, Ecole Normale Supérieure de Lyon and Université Claude Bernard Lyon, CNRS UMR 5276Lyon France
5. Department of GeologyUniversity of CaliforniaDavis, Davis California USA