1. Department of Geology and Geophysics, LSU, Baton Rouge, LA, USA
2. Museum of Natural Science, LSU, Baton Rouge, LA, USA
3. Cleveland Museum of Natural History, Cleveland, OH, USA
4. Swedish Museum of Natural History, Stockholm, Sweden
5. Institute for Geophysics and Department of Geological Sciences, Jackson School of Geosciences, University of Texas at Austin, TX, USA