1. Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada
2. † Special collection papers can be found online at http://www.minsocam.org/MSA/AmMin/special-collections.html.
3. Irish Centre for Research in Applied Geosciences, Department of Geology, School of Natural Sciences, Trinity College Dublin, Dublin 2, Ireland
4. School of Earth and Atmospheric Sciences, Queensland University of Technology (QUT), GPO Box 2434, Brisbane, Queensland 4001, Australia
5. GFZ, German Research Centre for Geosciences, 14473 Potsdam, Germany
6. ‡ Present address: Bundesanstalt für Materialforschung und – prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany
7. Institute of Geological Sciences, Freie Universität Berlin, Malteserstrasse, 74-100, Berlin, 12249, Germany