1. Centro de Geociencias Universidad Nacional Autónoma de México Juriquilla México
2. Department of Geosciences University of Texas at Dallas Richardson TX USA
3. Department of Earth and Planetary Sciences 1 University of New Mexico Albuquerque NM USA
4. Facultad de Ingeniería Universidad Autónoma de Tamaulipas Centro Universitario Tampico‐Madero Tampico México
5. Western State College Colorado Gunnison CO USA