1. Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, Michigan 48109, U.S.A.
2. § Special collection papers can be found online at http://www.minsocam.org/MSA/AmMin/special-collections.html.
3. † Orcid 0000-0003-4761-722X.
4. ‡ Present address: Hawaii Institute of Geophysics and Planetology, University of Hawai‘i at Mānoa, Honolulu, Hawaii, U.S.A. Orcid 0000-0003-2409-151X.