| Affiliation: | Paléomagnétisme, IPGP and CNRS, 4;avenue de Neptune, 94107 Saint-Maur cedex, France. E-mail: Geophysical Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, block 3, 1113;Sofia, Bulgaria Centre de Physique du Globe, B 5670;Dourbes (Viroinval), Belgium Laboratoire Magmas et Volcans, University Jean Monnet and CNRS, 23;Rue du Dr. P. Michelon, 42023 Saint-Etienne Cedex 02, France NIPR, 1-9-10;Kaga, Itabashi-ku, Tokyo 173-8515, Japan Department of Geology and Geography, St. Kliment Ohridski University, 15;Tzar Osvoboditel Blv., 1000 Sofia, Bulgaria |
