Visual Observation of the Outcrop at the North Wall of the Tokyo Submarine Canyon in Sagami Bay, Central Japan using the ROV <i>HYPER-DOLPHIN</i>
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- Mori Shin'ichi
- Hiratsuka City Museum
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- Takahashi Naoki
- Natural History Museum and Institute, Chiba
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- Shibata Kenichiro
- Yokosuka City Museum
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- Tanaka Yuichiro
- Institute of Geology and Geoinformation, Geological Survey of Japan, AIST
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- Hirata Daiji
- Kanagawa Prefectural Museum of Natural History
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- Oshima Mitsuharu
- Kanagawa Prefectural Museum of Natural History
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- Fujioka Kantaro
- Kanagawa University
Bibliographic Information
- Other Title
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- 無人探査機ハイパードルフィンによる相模湾東京海底谷北壁の露頭目視観察
- ムジン タンサキ ハイパードルフィン ニ ヨル サガミワン トウキョウ カイテイダニ ホクヘキ ノ ロトウ モクシ カンサツ
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Abstract
Visual observations were conducted at the mouth of the Tokyo Submarine Canyon (TSC), at the junction of the TSC and the Misaki Depression, in August 2010, from the ROV Hyper-Dolphin. Examination of the topography and geology of the TSC and Miura Basin revealed four lithostratigraphic units in area, Units I to IV (in stratigraphically descending order). Unit I consists of Recent unconsolidated mud that thinly covers the bottom of the TSC and two deep-sea terraces. Unit II is a middle Pleistocene conglomerate observed at water depths of 1148-1096 m; the lithology and areal distribution of Unit II suggest deposition from a debris flow that surged down the canyon. Unit III is a middle Pleistocene semi-consolidated muddy deposit consisting of alternating horizontal beds of sandstone and mudstone, observed at water depths of 1120-809 m; Unit III is present throughout the Misaki Depression. Unit IV is a consolidated muddy deposit consisting of N-dipping alternating beds of sandstone and mudstone, observed at water depths of 1174-1120 m; the unit is partly eroded and is overlain by Unit II. The stratigraphic relationships and distributions of lithofacies at the mouth of the TSC help clarify the nature of tectonism in the area of the TSC and Miura Basin.
Journal
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- The Journal of the Geological Society of Japan
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The Journal of the Geological Society of Japan 121 (5), 161-166, 2015-05-15
The Geological Society of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390282681218203904
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- NII Article ID
- 130005089844
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- NII Book ID
- AN00141768
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- ISSN
- 13499963
- 00167630
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- NDL BIB ID
- 026519121
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed