'Geological structure of the continental shelf in the northern part of Suruga Bay' [Japan]
2008
Kaji, T.(Tokyo Metropolitan Univ., Hachioji (Japan)) | Nemoto, K. | Yamazaki, H. | Shono, S. | Matsuda, T.
Suruga bay is a structural bay with a considerable number of geographical features. The Suruga Trough runs from north to south, and the Fujikawa Fan Delta is in the northern part of Suruga Bay. From seismic data on the continental shelf in the northern part of Suruga Bay, we clarified the formation processes of the geographical features from detailed sea-beam data and determined the displacement of the basement in the Wuerm ice age due to the subduction of the Philippine Sea Plate. As a result, unique geographical features were found to exist on the continental shelf in the northern part of Suruga Bay. We distinguished some of the geographical features and assumed a wavy surface and two gradual slopes. Moreover, we found that the base sank gradually from the region off Ueda to that off Fuji River from seismic data. However, large displacement of the base was confirmed to the west of Fuji River. This large displacement of base might show geographical features change from Wuerm.
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