Laboratoire de Géologie CNRS-ENS, 24 Rue Lhomond, Paris, 05, France ; Institute of Engineering, Univ. Nacional Autonoma de Mexico, Ciudad Universitaria,Circ. Escolar S/N, Mexico City, 04510, Mexico
DGSCA, Univ. Nacional Autonoma de Mexico, Ciudad Universitaria,Circ. Escolar S/N, Mexico City, 04510, Mexico
C E N C, 63 Fuxing Rd., Beijing, 100036, China
Institute of Engineering, Univ. Nacional Autonoma de Mexico, Ciudad Universitaria,Circ. Escolar S/N, Mexico City, 04510, Mexico