1. Department of Geology Kansas State University Manhattan KS USA
2. Department of Geology Juniata College Huntingdon PA USA
3. Department of Marine, Earth, and Atmospheric Sciences North Carolina State University Raleigh NC USA
4. Department of Geological Sciences University of Colorado Boulder Boulder CO USA
5. Geowissenschaftliches Zentrum Göttingen Universität Göttingen Germany
6. Trace Element and Radiogenic Isotope Lab University of Arkansas Fayetteville AR USA