Affiliation: | Department of Geology, Miami University of Ohio, Oxford, OH 45056, USA;Instituto de Geofísica, U. N. A. M., Ciudad Universitaria, Delegacion Coyoacan, C. P. 04510, Mexico D. F.;Department of Geology and Geophysics, University of Wisconsin–Madison, 1215 W Dayton St., Madison, WI 53706, USA. E-mail:;DGOT/SisVoc, Universidad de Guadalajara, Av. Maestros y Mariano Barcenas, C. P. 44260, Guadalajara, Jalisco, Mexico |