Author's Organization:Department of Earth Science,College of General Education,Kyushu University Department of Earth Sciences,Faculty of science,Yamagata University Department of Earth Science,College of general Education,Kyushu University
Published: April 15, 1990Received: November 30, 1989Available on J-STAGE: April 11, 2008Accepted: February 19, 1990
Advance online publication: -
Revised: -