Author's Organization：Department of Earth Sciences,College of Humanities and Sciences,Nihon University Department of Earth Sciences,College of Humanities and Sciences,Nihon University Department of Earth Sciences and Astoronomy,College of Arts and Sciences,The University of Tokyo
Published: March 15, 1988Received: July 20, 1987Available on J-STAGE: April 11, 2008Accepted: December 22, 1987
Advance online publication: -
Revised: -
