Author's Organization:Department of Earth and Planetary Systems Science,Faculty of Science,Hiroshima University Department of Earth and Planetary Systems Science,Faculty of Science,Hiroshima University Department of Natural Science,Faculty of Education,Kumamoto University
Published: January 15, 1998Received: April 11, 1997Available on J-STAGE: April 11, 2008Accepted: October 20, 1997
Advance online publication: -
Revised: -