1. Department of Earth and Planetary Sciences Rutgers University Piscataway NJ USA
2. Lamont‐Doherty Earth Observatory Columbia University Palisades NY USA
3. Department of Geology and Geophysics University of Utah Salt Lake City UT USA
4. Institute for Geophysics, Jackson School of Geosciences University of Texas at Austin Austin TX USA
5. Berkeley Geochronology Center Berkeley CA USA
6. Department of Geosciences University of Arizona Tucson AZ USA
7. Natural History Museum of Utah University of Utah Salt Lake City UT USA
8. Department of Geosciences University of Texas at Dallas Richardson TX USA
9. Petrified Forest National Park Petrified Forest AZ USA