1. Department of Geological Sciences, Jackson School of Geosciences University of Texas at Austin Austin TX USA
2. Now at Department of Structural Geology and Geodynamics, Geoscience Center University of Göttingen Göttingen Germany
3. Institute for Geophysics, Jackson School of Geosciences University of Texas at Austin Austin TX USA
4. Departament de Geologia Universitat Autònoma de Barcelona Bellaterra Spain
5. Department of Earth and Planetary Sciences University of New Mexico Albuquerque NM USA