1. Steinman Institut für Geologie, Mineralogie und Paläontologie, Rheinische Friedrich-Wilhems-Universität, Bonn 53115, Germany
2. † Special collection papers can be found online at http://www.minsocam.org/MSA/AmMin/special-collections.html.
3. Earth and Atmospheric Sciences, University of Alberta, Edmonton T6G 2E9, Canada