1. School of Geography, Geology & the Environment, University of Leicester, Leicester, UK
2. GNS Science, Dunedin, New Zealand
3. School of Earth, Environment & Society, Bowling Green State University, Bowling Green, OH, USA
4. Department of Earth and Environmental Science, New Mexico Institute of Mining and Technology, Socorro, NM, USA
5. Institute of Earth Sciences Jaume Almera, ICTJA, CSIC, Barcelona, Spain