Senior Lecturer, University of Sheffield, Sir Frederick Mappin Building, Mappin Street Sheffield S1 3JD, UK. Manuscript was received for review on April 3, 2000. Written discussions on this paper should be submitted before July 1, 2002 to the Japanese Geo | 論文著者

Senior Lecturer, University of Sheffield, Sir Frederick Mappin Building, Mappin Street Sheffield S1 3JD, UK. Manuscript was received for review on April 3, 2000. Written discussions on this paper should be submitted before July 1, 2002 to the Japanese Geo

Senior Lecturer, University of Sheffield, Sir Frederick Mappin Building, Mappin Street Sheffield S1 3JD, UK. Manuscript was received for review on April 3, 2000. Written discussions on this paper should be submitted before July 1, 2002 to the Japanese Geo

Senior Lecturer, University of Sheffield, Sir Frederick Mappin Building, Mappin Street Sheffield S1 3JD, UK. Manuscript was received for review on April 3, 2000. Written discussions on this paper should be submitted before July 1, 2002 to the Japanese Geo

Senior Lecturer, University of Sheffield, Sir Frederick Mappin Building, Mappin Street Sheffield S1 3JD, UK. Manuscript was received for review on April 3, 2000. Written discussions on this paper should be submitted before July 1, 2002 to the Japanese Geo

Senior Lecturer, University of Sheffield, Sir Frederick Mappin Building, Mappin Street Sheffield S1 3JD, UK. Manuscript was received for review on April 3, 2000. Written discussions on this paper should be submitted before July 1, 2002 to the Japanese Geo

Senior Lecturer, University of Sheffield, Sir Frederick Mappin Building, Mappin Street Sheffield S1 3JD, UK. Manuscript was received for review on April 3, 2000. Written discussions on this paper should be submitted before July 1, 2002 to the Japanese Geo

Senior Lecturer, University of Sheffield, Sir Frederick Mappin Building, Mappin Street Sheffield S1 3JD, UK. Manuscript was received for review on April 3, 2000. Written discussions on this paper should be submitted before July 1, 2002 to the Japanese Geo

Senior Lecturer, University of Sheffield, Sir Frederick Mappin Building, Mappin Street Sheffield S1 3JD, UK. Manuscript was received for review on April 3, 2000. Written discussions on this paper should be submitted before July 1, 2002 to the Japanese Geo

Senior Lecturer, University of Sheffield, Sir Frederick Mappin Building, Mappin Street Sheffield S1 3JD, UK. Manuscript was received for review on April 3, 2000. Written discussions on this paper should be submitted before July 1, 2002 to the Japanese Geo

Senior Lecturer, University of Sheffield, Sir Frederick Mappin Building, Mappin Street Sheffield S1 3JD, UK. Manuscript was received for review on April 3, 2000. Written discussions on this paper should be submitted before July 1, 2002 to the Japanese Geo

Senior Lecturer, University of Sheffield, Sir Frederick Mappin Building, Mappin Street Sheffield S1 3JD, UK. Manuscript was received for review on April 3, 2000. Written discussions on this paper should be submitted before July 1, 2002 to the Japanese Geo

Senior Lecturer, University of Sheffield, Sir Frederick Mappin Building, Mappin Street Sheffield S1 3JD, UK. Manuscript was received for review on April 3, 2000. Written discussions on this paper should be submitted before July 1, 2002 to the Japanese Geo

Senior Lecturer, University of Sheffield, Sir Frederick Mappin Building, Mappin Street Sheffield S1 3JD, UK. Manuscript was received for review on April 3, 2000. Written discussions on this paper should be submitted before July 1, 2002 to the Japanese Geo

Senior Lecturer, University of Sheffield, Sir Frederick Mappin Building, Mappin Street Sheffield S1 3JD, UK. Manuscript was received for review on April 3, 2000. Written discussions on this paper should be submitted before July 1, 2002 to the Japanese Geo

Senior Lecturer, University of Sheffield, Sir Frederick Mappin Building, Mappin Street Sheffield S1 3JD, UK. Manuscript was received for review on April 3, 2000. Written discussions on this paper should be submitted before July 1, 2002 to the Japanese Geo

Senior Lecturer, University of Sheffield, Sir Frederick Mappin Building, Mappin Street Sheffield S1 3JD, UK. Manuscript was received for review on April 3, 2000. Written discussions on this paper should be submitted before July 1, 2002 to the Japanese Geo

Senior Lecturer, University of Sheffield, Sir Frederick Mappin Building, Mappin Street Sheffield S1 3JD, UK. Manuscript was received for review on April 3, 2000. Written discussions on this paper should be submitted before July 1, 2002 to the Japanese Geo

Senior Lecturer, University of Sheffield, Sir Frederick Mappin Building, Mappin Street Sheffield S1 3JD, UK. Manuscript was received for review on April 3, 2000. Written discussions on this paper should be submitted before July 1, 2002 to the Japanese Geo

Senior Lecturer, University of Sheffield, Sir Frederick Mappin Building, Mappin Street Sheffield S1 3JD, UK. Manuscript was received for review on April 3, 2000. Written discussions on this paper should be submitted before July 1, 2002 to the Japanese Geo

Senior Lecturer, University of Sheffield, Sir Frederick Mappin Building, Mappin Street Sheffield S1 3JD, UK. Manuscript was received for review on April 3, 2000. Written discussions on this paper should be submitted before July 1, 2002 to the Japanese Geo